Page 1 User Manual Original Instructions High Resolution Analog I/O Modules Catalog Numbers 1756-IF8I, 1756-IRT8I, 1756-OF8I, 1756-IR12, 1756-IT16...
Page 2 Important User Information Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
Page 3: Table Of Contents
Table of Contents Summary of Changes ......... . . 9 Preface Product Compatibility and Download Center .
Page 4 1756-IF8I Module Features ........41...
Page 5 Table of Contents Chapter 5 1756-OF8I Module Features ........89 1756-OF8I Isolated Analog Multiple Output Ranges .
Page 6 Current Output Type ....... . 159 Chapter 9 Status Indicators for the 1756-IF8I Module ....165 Troubleshoot Your Module Status Indicators for the 1756-IRT8I Module .
Page 7 1756-IF8I Module Tags ........
Page 8 Table of Contents Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 9: Preface
Preface This manual describes how to install, configure, and troubleshoot ControlLogix® analog I/O modules. You must be able to program and operate a ControlLogix controller to use your analog I/O modules. If you need additional information, see Additional Resources on page ControlLogix analog I/O modules convert analog signals to digital values for inputs and convert digital values to analog signals for outputs.
Page 10: Additional Resources
Provides declarations of conformity, certificates, and other website certification details. You can view or download Rockwell Automation publications at http:/www.rockwellautomation.com/literature/. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative. Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 11: Before You Begin
Chapter Analog I/O Module Operation in the ControlLogix System Topic Page Before You Begin Ownership Configure a Module Direct Connections Input Module Operation Output Module Operation Listen-only Mode ControlLogix® controllers use analog I/O modules to control devices in a ControlLogix control system. The modules are installed in a ControlLogix chassis and use a removable terminal block (RTB) or a Bulletin 1492 interface module cable to connect to field-side wiring.
Page 12 Analog I/O Module Operation in the ControlLogix System Table 1 - Types of ControlLogix Isolated Analog I/O Modules Cat. No. Description RTB Used Page 1756-IF8I 8-point general-purpose isolated analog current/voltage input module 36-pin 1756-IRT8I 8-point isolated combined temperature and mV...
Page 13: Ownership
Typically, each module in the system has only one owner. Some Input modules can have multiple owners. Output modules, and Input modules that have an Output image like the 1756-IF8I and 1756-IRT8I modules, however, are limited to one owner.
Page 14: Direct Connections
Chapter 1 Analog I/O Module Operation in the ControlLogix System • Remote chassis - A chassis that does not contain the module’s owner- controller but is connected to the local chassis over the EtherNet/IP™ network or ControlNet™ network. Local Chassis Remote Chassis Controller EtherNet/IP Network...
Page 15: Input Module Operation
The 1756-IF8I, 1756-IRT8I, 1756-IR12, and 1756-IT16 modules do not offer the RTS parameter. With these modules, the channel sampling rate is exclusively determined by the RPI value.
Page 16: Input Modules In A Local Chassis
Chapter 1 Analog I/O Module Operation in the ControlLogix System At the RPI, the following events occur. 1. The module scans its channels for input data. 2. The module broadcasts the data to its backplane. On-Board Memory Status Data Channel Data Ch 0 Channel Data Ch 1...
Page 17: Input Modules In A Remote Chassis
Analog I/O Module Operation in the ControlLogix System Chapter 1 Input Modules in a Remote Chassis When an input module resides in a remote chassis (see Configure a Module on page 13), it is considered remote input module. At the RPI, the following events occur. 1.
Page 18: Output Module Operation
Chapter 1 Analog I/O Module Operation in the ControlLogix System The following graphic shows an Event task dialog box in Logix Designer application. Event tasks are useful for synchronizing process variable (PV) samples and proportional integral derivative (PID) calculations. For more information on Event tasks, see the Logix5000 Controllers Tasks, Programs, and Routines Programming Manual, publication 1756-PM005.
Page 19: Output Modules In A Local Chassis
Analog I/O Module Operation in the ControlLogix System Chapter 1 Output Modules in a Local Chassis When an output module resides in a local chassis (see Configure a Module on page 13), it receives data almost immediately after the owner-controller sends it. The analog output module broadcasts data using Multicast as its connection method in a local chassis.
Page 20: Listen-Only Mode
Chapter 1 Analog I/O Module Operation in the ControlLogix System Any controller in the system can listen to the data from any I/O module, that is, Listen-only Mode input data or echoed output data, even if the controller does not own the module. During the I/O configuration process, you can specify a Listen-Only connection.
Page 21 Chapter Analog I/O Module Features Topic Page Common Analog I/O Features Relationship between Module Resolution and Scaling Calibration Calibrated Accuracy Error Calculated over Hardware Range RTD and Thermocouple Error Calculations Thermocouple Resolution ControlLogix® analog input modules convert an analog signal to a digital value. The following are example analog signal types to which input modules convert to digital values: •...
Page 22: Analog I/O Module Features
Chapter 2 Analog I/O Module Features The ControlLogix analog I/O modules have the following features: Common Analog I/O Features CIP Sync Timestamp of Data • Rolling Timestamp of Data • Floating Point Data Format • Module Quality Reporting • Calibration •...
Page 23: Rolling Timestamp Of Data
0…32,767 ms; where 1 ms = 1 count. Rolling Timestamp with Input Modules The 1756-IF8I, 1756-IRT8I, 1756-IR12, and 1756-IT16 modules scan their inputs at the RPI, update the input data, and update the rolling timestamp value.
Page 24: Module Quality Reporting
The Low Signal point equates to the Low Engineering point and the High Signal point matches the High Engineering point. A 1756-IF8I module that is used in current mode maintains 0…21 mA range EXAMPLE capability. Your application uses a 4…20 mA transmitter.
Page 25: Calibration
Status data is available via the module tags. • For more information on fault and status reporting via module tags, see the following: – 1756-IF8I fault and status reporting - page 58 – 1756-IRT8I fault and status reporting - page 88 –...
Page 26: Configurable Software
Chapter 2 Analog I/O Module Features Configurable Software Use one of the following software applications with your module: • RSLogix 5000® software, versions 18…20 • Logix Designer application, version 21 or later You must install Add-on Profiles (AOP) to use the modules in any Logix IMPORTANT Designer application or RSLogix 5000 software project.
Page 27: Module Inhibiting
Analog I/O Module Features Chapter 2 Module Inhibiting This feature suspends the connection between an owner-controller and a module. This process can occur in either of the following ways: • You write configuration for an I/O module but inhibit the module to prevent it from communicating with the owner-controller.
Page 28: Electronic Keying
Chapter 2 Analog I/O Module Features Electronic Keying Electronic Keying reduces the possibility that you use the wrong device in a control system. It compares the device defined in your project to the installed device. If keying fails, a fault occurs. These attributes are compared. Attribute Description Vendor...
Page 29: Elegant Migration Emulation Mode
All data to/from an 8-channel module is mapped from a 6-channel module format to an 8-channel module format. The controller still sends data in the 1756-IF6I module format but firmware internally moves data to the 1756-IF8I module format. Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 30 1756-IF6I module configuration data sent to the 1756-IF8I module. 1756-IF6I Module Configuration Example The Controller still sends data in the 1756-IF6I module format but firmware internally moves data to the 1756-IF8I format. An 8-channel module still behaves as an 8-channel module, but accepts a 6-channel module format.
Page 31: Relationship Between Module Resolution And Scaling
Resolution on Input Modules The theoretical operating range is the full range across which the module can operate. For example, a 1756-IF8I module in Current mode has a theoretical operating range = -25.1…25.1 mA. The 24-bit resolution and 16,777,216 counts are available across 50.2 mA, which yields our calculated 2.99 nA/count...
Page 32: Scaling
When scaling, you choose two points along the module’s operating range and apply low and high values to those points. For example, if you are using the 1756-IF8I module in Current mode, the module supports a 0…21 mA actual range capability. But your application uses a 4…20 mA transmitter.
Page 33: Calibration
Analog I/O Module Features Chapter 2 The returned engineering unit’s value is indicated in the I.Ch[x].Data tag as shown in Table Figure 3 - Module Resolution Compared to Module Scaling Module Resolution 0 mA 21 mA Module scaling represents the data 5,815,117 counts returned from the module to the controller.
Page 34: Calibrated Accuracy
Chapter 2 Analog I/O Module Features The calibrated accuracy specification represents the module’s accuracy when its Calibrated Accuracy ambient temperature is the same as the temperature at which the module was calibrated. Specification Description Calibrated accuracy at 25 °C (77 °F) This specification matches the temperature at which the module was calibrated in the factory during manufacturing.
Page 35: Rtd Error
Analog I/O Module Features Chapter 2 RTD Error Module error on the 1756-IRT8I or 1756-IR12 module that is used with an RTD input is defined in ohms. The error is calculated across the entire input range selected, not the available range of a sensor used with the module. For example, if the 1…500 Ω...
Page 36: Module Error At 25 °C (77 °F)
Chapter 2 Analog I/O Module Features • Application temperature, that is, the temperature of the physical location where the thermocouple is being used. When a 1756-IRT8I or 1756-IT16 module is used with a thermocouple input EXAMPLE type in the following conditions, module error at 25 °C (77 °F) is ±3.74 °C (38.73 °F): •...
Page 37 Analog I/O Module Features Chapter 2 Table 6 lists the 1756-IT16 module error at 25 °C (77 °F) when using a thermocouple input type. Table 6 - 1756-IT16 Module Error At 25 °C (77 °F) with Thermocouple Input Type Application Module Error (+/-) at 25 °C (77 °F) When Connected to Thermocouple Types Temperature Type B...
Page 38: Thermocouple Resolution
Chapter 2 Analog I/O Module Features Thermocouple resolution indicates the degrees that an application temperature Thermocouple Resolution must change before the 1756-IRT8I module that is connected to a thermocouple module reports a change. Resolution depends on the following factors: • Thermocouple sensor type, any of the following: –...
Page 39 Analog I/O Module Features Chapter 2 Table 7 lists the 1756-IRT8I module resolution when using a thermocouple input type. Table 7 - 1756-IRT8I Module Resolution in Degrees C with Thermocouple Input Type Application Module Resolution (in degrees C) When Connected to This Thermocouple Type Temperature Type B Type C...
Page 40 Chapter 2 Analog I/O Module Features Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 41: 1756-If8I Module Features
• Rate Alarm • Sensor Offset • Wire Off Detection • Synchronized Sampling Most of the features available on the 1756-IF8I module are software IMPORTANT configurable. For more information on how to configure the module, see Chapter 7, Configure ControlLogix Analog I/O Modules on page 125.
Page 42: Internal Loop Power Source
With this module, the short is between terminals IN_x/I/SRC and RTN_x (where x is the channel number). If a sourcing overcurrent condition exists, the 1756-IF8I module sets the input to 24 mA, that is, the equivalent engineering unit value. This value indicates a special error condition beyond the normal overrange value, that is, 21 mA: •...
Page 43: Multiple Input Ranges
Current input type and Source Loop Current mode enabled. The 1756-IF8I module uses the power provided across the ControlLogix® chassis backplane as the source for loop power. The 1756-IF8I module consumes 10.6 W of backplane power. Because of the demands that are placed on that supply, take special care when calculating the power requirements for modules in the same chassis as a 1756-IF8I module.
Page 44 Relationship between Noise Rejection Level and RPI Setting The 1756-IF8I module offers two levels of line noise rejection. Each level has a filter associated with it. The module automatically determines which filter is used based on the Notch Filter setting and RPI rate.
Page 45 The following table lists the available Notch Filter settings, the minimum RPI rate available with that Notch Filter setting, and the corresponding noise response. Table 8 - 1756-IF8I Notch Filter Settings and the Minimum RPI Rate Notch Filter Setting 5 Hz...
Page 46: Underrange/Overrange Detection
This feature detects when the isolated input module is operating beyond limits set by the input range. For example, if you are using the 1756-IF8I module in the 0…10V input range and the module voltage increases to 11V, the overrange feature detects this condition.
Page 47: Digital Filter
1756-IF8I Isolated Analog Input Module Chapter 3 Digital Filter The digital filter smooths input data noise transients on each input channel. This value specifies the time constant for a digital, first-order lag filter on the input. It is specified in units of milliseconds. A value of 0 (zero) disables the filter.
Page 48: Process Alarms
Chapter 3 1756-IF8I Isolated Analog Input Module Process Alarms Process alarms alert you when the module has exceeded configured high or low limits for each channel. The limits are set at four, user-configurable, alarm trigger points: • High high • High •...
Page 49 1756-IF8I Isolated Analog Input Module Chapter 3 Alarm Deadband You can configure an alarm deadband to work with these alarms. The deadband lets the process alarm status bit remain set, despite the alarm condition disappearing, as long as the input data remains within the deadband of the process alarm.
Page 50: Rate Alarm
Chapter 3 1756-IF8I Isolated Analog Input Module Rate Alarm The rate alarm triggers if the rate of change between input samples for each channel exceeds the specified trigger point for that channel. The actual rate of change for the last sample is returned in the Ch[x].RateOfChange input tag of each channel.
Page 51: Wire Off Detection
1756-IF8I Isolated Analog Input Module Chapter 3 Wire Off Detection The 1756-IF8I module alerts you when a wire is disconnected from a channel or the RTB is removed from the module. The following events occur when a wire off condition exists: •...
Page 52: Synchronized Sampling
You can use Synchronized Sampling across inputs on 1756-IF8I modules and 1756-IRT8I modules in the same system. For example, if you have 12 input devices that are connected to one 1756-IF8I module and two 1756-IRT8I modules in the same chassis, or different chassis...
Page 53: 1756-If8I Diagrams
1756-IF8I Isolated Analog Input Module Chapter 3 1756-IF8I Diagrams Figure 5 - 1756-IF8I Module Block Diagram Field Side Backplane Side DC-DC RIUP Shutdown Circuit Circuit System Channel 0 DC-DC Isolated Power Converter IN_0/V Signal Conditioning Isolator and A/D Converter IN_0/I/SRC...
Page 54 1000 Ω 0.01 µF 55 Ω 0.1 µF RTN-x 2.5V Vref 0.01 µF 0.01 µF Figure 7 - 1756-IF8I Input Module Field-side Circuit with an Externally-powered Current Input Loop IN_x/V 7500 Ω 20 Ω IN_x/I/SRC Current Limit – 25 Ω...
Page 55 1756-IF8I Isolated Analog Input Module Chapter 3 Figure 8 - 1756-IF8I Module Field-side Circuit with the Module Sourcing the Current Input Loop -18V +18V IN_x/V 7500 Ω Current Limit 20 Ω IN_x/I/SRC Current Limit 25 Ω 1000 Ω 0.01 µF 4…20 mA...
Page 56 Chapter 3 1756-IF8I Isolated Analog Input Module Figure 10 - 1756-IF8I Module Wiring Diagram -Current Mode with Internal Loop Power IMPORTANT In this wiring diagram, the module provides 24V DC loop power. IMPORTANT: Remember the following: • If separate power sources are used, do...
Page 57 1756-IF8I Isolated Analog Input Module Chapter 3 Figure 11 - 1756-IF8I Module Wiring Diagram - Voltage Mode IMPORTANT: If separate power sources are used, do not exceed the specific IN_0/V IN_1/V Device isolation voltage. For more information User Analog External...
Page 58: Fault And Status Reporting
Chapter 3 1756-IF8I Isolated Analog Input Module The 1756-IF8I module multicasts fault and status data with channel data to the Fault and Status Reporting owner and listening controllers. The data is returned via module tags that you can monitor in your Logix Designer application.
Page 59: Common Module Features
Chapter Temperature-sensing Analog Modules Topic Page Common Module Features 1756-IRT8I Diagrams 1756-IR12 Diagrams 1756-IT16 Diagrams Fault and Status Reporting Module Description 1756-IRT8I The 1756-IRT8I module has eight isolated channels. Each channel supports connection to the following input types: • RTD, both 3-wire and 4-wire •...
Page 60: Module Input Ranges
Chapter 4 Temperature-sensing Analog Modules Most of the features available on the modules are software configurable. For IMPORTANT more information on how to configure the module, see Chapter 7, Configure ControlLogix Analog I/O Modules on page 125 Module Input Ranges The modules offer multiple input ranges.
Page 61: Notch Filter
Temperature-sensing Analog Modules Chapter 4 Table 11 - Module - Channel Input Ranges Module Input Type Sensor Type Input Range TC Type B TC Type C TC Type E TC Type J TC Type K 1756-IRT8I Thermocouple -100…100 mV and 1756-IT16 TC Type N TC Type R TC Type S...
Page 62 Chapter 4 Temperature-sensing Analog Modules The following graphic shows 10 Hz Notch Filter selection and how the noise is dissipated over the entire spectrum but especially at the Notch Filter setting and its overtones. Relationship between Noise Rejection Level and RPI Setting The modules offer two levels of line noise rejection.
Page 63 Temperature-sensing Analog Modules Chapter 4 1756-IRT8I Notch Filter Setting The following tables lists the available Notch Filter settings for the 1756-IRT8I module. Table 12 - 1756-IRT8I Notch Filter Settings Notch Setting 5 Hz 10 Hz 15 Hz 20 Hz 50 Hz 60 Hz 100 Hz 500 Hz...
Page 64 Chapter 4 Temperature-sensing Analog Modules 1756-IR12 and 1756-IT16 Notch Filter Setting The following tables lists the available Notch Filter settings for the 1756-IR12 and 1756-IT16 modules. Table 14 - 1756-IR12 and 1756-IT16 Notch Filter Settings Notch Setting 20 Hz 50 Hz 60 Hz (Default) 100 Hz 500 Hz...
Page 65: Underrange/Overrange Detection
Temperature-sensing Analog Modules Chapter 4 Underrange/Overrange Detection This feature detects when a temperature-measuring input module is operating beyond limits set by the input range. For example, if you are using the module in the 0…1000 Ω input range and the module resistance increases to 1050 Ω, the overrange detection detects this condition.
Page 66: Process Alarms
Chapter 4 Temperature-sensing Analog Modules By using a step input change to illustrate the filter response, you can see that when the digital filter time constant elapses, 63.2% of the total response is reached. Each additional time constant achieves 63.2% of the remaining response. 100% Amplitude Unfiltered Input...
Page 67 Temperature-sensing Analog Modules Chapter 4 You can latch process alarms. The alarm remains on, even if the condition causing it to occur disappears, until the alarm is unlatched. You must manually unlatch the alarm. You can unlatch the alarm, by using one IMPORTANT of the following methods: •...
Page 68: Rate Alarm
Chapter 4 Temperature-sensing Analog Modules Rate Alarm The rate alarm triggers if the rate of change between input samples for each channel exceeds the specified trigger point for that channel. The actual rate of change for the last sample is returned in the Ch[x].RateOfChange input tag of each channel.
Page 69: Wire Off Detection
Temperature-sensing Analog Modules Chapter 4 You can set the 10 Ohm copper offset in either of the following ways: • On the Configuration tab of the Module Properties dialog box. In this case, valid values are from -0.99…0.99. • Directly in the channel’s C.Ch[x].TenOhmOffset tag. In this case, valid values are -99…99 For example, if the resistance of a copper RTD used with a channel is 9.74 Ω...
Page 70 Chapter 4 Temperature-sensing Analog Modules Because these modules can each be used in various applications, differences exist when a wire off condition is detected in each application. The table lists the differences that occur when a wire off condition occurs in various applications. Table 16 - Module Wire Off Conditions Application Configuration Wire Off Condition Cause...
Page 71: Temperature Units
Temperature-sensing Analog Modules Chapter 4 Temperature Units You can use the following temperature units with your module: • Celsius • Kelvin • Fahrenheit • Rankine Each channel is individually configurable for its temperature units. To see where to set the Temperature Units, see page 131.
Page 72 Chapter 4 Temperature-sensing Analog Modules For example, you can configure a channel with the following parameters: • Input Type = RTD (Ohms) • Sensor Type = 100 Ohm Pt 385 • Temperature Units = Celsius For the 1756-IRT8I, the Scaling parameters are set as follows: •...
Page 73: 1756-Irt8I Thermocouple Wire Length Compensation
Temperature-sensing Analog Modules Chapter 4 Table 18 - Temperature Limits for RTD and Thermocouple Sensor Types Input Type Sensor Type Temperature Range Limits Thermocouple (mV) TC Type B 21…1820 °C (68…3308 °F) 293…2093 °K 528…3768 °R TC Type C 0…2320 °C (32…4208 °F) 273…2593 °K 492…4668 °R TC Type D...
Page 74: Synchronized Sampling
Chapter 4 Temperature-sensing Analog Modules To avoid increased module error resulting from increased resistance levels, the module can automatically compensate for resistance levels and maintain its accuracy. The module measures the wire resistance and actively compensates for that resistance with each sample. This functionality works when thermocouple wiring is connected to the IMPORTANT module before the module is powered or power is cycled to the module.
Page 75: Cold Junction Compensation
Catalog number 1756-CJC includes two CJC sensors. To order CJC sensors, contact your local Allen-Bradley distributor or Rockwell Automation sales representative. Remember the following when compensating the input signal from your module: •...
Page 76 Chapter 4 Temperature-sensing Analog Modules Connecting a CJC via a Removable Terminal Block When using an RTB, if you choose to connect CJC sensors to your module, you must connect a CJC sensor at the top of the RTB and one at the bottom of the RTB.
Page 77 Temperature-sensing Analog Modules Chapter 4 If you connect a CJS via an IFM, configure the module as shown on the Module Properties Configuration tab. Check Remote CJ Compensation. Cold Junction Disable Option You can disable cold junction compensation on your module. Check Cold Junction Disable to disable compensation as shown below.
Page 78 Chapter 4 Temperature-sensing Analog Modules Cold Junction Offset Option The Cold Junction Offset box on the Module Properties Configuration Tab lets you make module-wide adjustments to cold junction compensation values. The single Cold Junction Offset affects all channels equally. If you know that your cold junction compensation values are consistently inaccurate by some level, for example, 1.2 °C, type the value into the box to account for this inaccuracy.
Page 79: 1756-Irt8I Diagrams
Temperature-sensing Analog Modules Chapter 4 1756-IRT8I Diagrams Figure 13 - 1756-IRT8I Module Block Diagram Field Side Backplane Side Channel 0 DC-DC Isolated Power Converter ADC CJC CJC 0 (Channel 0) IN_0/RTD D DC-DC RIUP Signal Conditioning Isolator Shutdown IN_0(+)/A Circuit and A/D Converter Circuit IN_0(-)/B...
Page 80 Chapter 4 Temperature-sensing Analog Modules Figure 14 - 1756-IRT8I Module Field-side with 3-wire RTD Input I exc I exc 600 µA 600 µA IN_x/RTD D 1000 Ω 10 Ω IN_x(+)/A 0.01 µF A/D Converter 1000 Ω 0.01 µF 10 Ω 2.5V Vref 0.1 µF IN_x(-)/B...
Page 81 Temperature-sensing Analog Modules Chapter 4 Figure 17 - 1756-IRT8I Module Wiring Diagram - 3-wire RTD Input MPORTANT: Remember the following: • If separate power sources are used, do not exceed the specific isolation 3-wire RTD voltage. For more information on module specifications, see the 1756 CJC 0 CJC 0...
Page 82 Chapter 4 Temperature-sensing Analog Modules Figure 18 - 1756-IRT8I Module Wiring Diagram - 4-wire RTD Input IMPORTANT: Remember the following: • If separate power sources 4-wire RTD are used, do not exceed the specific isolation voltage. CJC 0 CJC 0 For more information on IN_0(-)/B IN_0(+)/A...
Page 83 Temperature-sensing Analog Modules Chapter 4 Figure 19 - 1756-IRT8I Module Wiring Diagram - Thermocouple Input IMPORTANT: Remember the following: • Connect the white end of the CJC sensor to the Cold Junction Sensor even-numbered terminal., and connect the orange end of the CJC sensor to the odd-numbered terminals.
Page 84: 1756-Ir12 Diagrams
Chapter 4 Temperature-sensing Analog Modules 1756-IR12 Diagrams Figure 20 - 1756-IR12 Module Block Diagram Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 85 Temperature-sensing Analog Modules Chapter 4 Figure 21 - 1756-IR12 Module Field-side Circuit with RTD Input Figure 22 - 1756-IR12 Module Wiring Diagram - 3-wire RTD Input IMPORTANT: Remember the following: • If separate power sources are used, do not exceed the specific isolation voltage as listed in the specifications.
Page 86: 1756-It16 Diagrams
Chapter 4 Temperature-sensing Analog Modules 1756-IT16 Diagrams Figure 23 - 1756-IT16 Module Block Diagram Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 87 Temperature-sensing Analog Modules Chapter 4 Figure 24 - 1756-IT16 Module Field-side Circuit with Thermocouple Input Figure 25 - 1756-IT16 Module Wiring Diagram - Thermocouple Input IMPORTANT: Remember the following: • Connect the white end of the CJC sensor to the even-numbered terminal.
Page 88: Fault And Status Reporting
Chapter 4 Temperature-sensing Analog Modules The module multicasts fault and status data with channel data to the owner and Fault and Status Reporting listening controllers. The data is returned via module tags that you can monitor in your Logix Designer application. The following table lists the complete set of fault and status tags for temperature-sensing modules.
Page 89: 1756-Of8I Module Features
Chapter 1756-OF8I Isolated Analog Output Module Topic Page 1756-OF8I Module Features 1756-OF8I Diagrams Drive Different Loads with the 1756-OF8I Module Fault and Status Reporting Redundant Owners The 1756-OF8I module has eight isolated channels. Each channel supports the following output types: •...
Page 90: Multiple Output Ranges
Chapter 5 1756-OF8I Isolated Analog Output Module Multiple Output Ranges The 1756-OF8I module offers multiple output ranges that are dictated by channel configuration choices. The output type selection determines the available ranges. Table 20 - Channel Output Ranges Output Type Output Range Current (mA) 0…20 mA...
Page 91: Hold For Initialization
1756-OF8I Isolated Analog Output Module Chapter 5 The table describes the types of ramping that are possible. Ramping type Description Run mode ramping When the module is in Run mode, ramping occurs to all new output values at the MaxRampRate. Ramp to Program mode When the present output value changes to the Program value after a Program command is received from the controller.
Page 92: Clamp/Limit Alarms
Chapter 5 1756-OF8I Isolated Analog Output Module You can disable or latch clamping alarms on a per channel basis. The alarms are disabled by default. Clamp values are in engineering units and are not automatically IMPORTANT updated when the scaling high and low engineering units are changed. Failure to update the clamp values can generate a very small output signal that could be misinterpreted as a hardware problem.
Page 93: 1756-Of8I Diagrams
1756-OF8I Isolated Analog Output Module Chapter 5 1756-OF8I Diagrams Figure 26 - 1756-OF8I Module Block Diagram Field Side Backplane Side DC-DC RIUP Shutdown Circuit Circuit System Channel 0 DC-DC Isolated Power Converter OUT_0/V D/A Converter and Isolator Output Stage OUT_0/I RTN_0 Vref Backplane...
Page 94 Chapter 5 1756-OF8I Isolated Analog Output Module Figure 27 - 1756-OF8I Module Field-side Circuit with Current Output Power Supply OUT_x/V Current D/A Converter Amplifier 46 Ω OUT_x/I Iout 5V Vref 0.0022 µF 0.047 µF Current Output Device 0…1000 Ω -13V RTN-x Figure 28 - 1756-OF8I Module Field-side Circuit with Voltage Output 4640 Ω...
Page 95 1756-OF8I Isolated Analog Output Module Chapter 5 Figure 29 - 1756-OF8I Module Wiring Diagram - Current Output Type IMPORTANT: Remember the following: • If separate power sources are used, do OUT_0/V OUT_1/V not exceed the specific isolation < 1000 Ω User OUT_0/I OUT_1/I voltage.
Page 96: Drive Different Loads With The 1756-Of8I Module
Chapter 5 1756-OF8I Isolated Analog Output Module Figure 30 - 1756-OF8I Module Wiring Diagram - Voltage Output Type IMPORTANT: Remember the following: • If separate power sources are used, do OUT_0/V OUT_1/V >1000 Ω User not exceed the specific isolation Analog Output OUT_0/I OUT_1/I...
Page 97: Fault And Status Reporting
1756-OF8I Isolated Analog Output Module Chapter 5 The 1756-OF8I module multicasts fault and status data with channel data to the Fault and Status Reporting owner and listening controllers. The data is returned via module tags that you can monitor in your Logix Designer application. With some exceptions, as noted in the following table, the 1756-OF8I module provides the fault and data status in a channel-centric format.
Page 98: Redundant Owners
Chapter 5 1756-OF8I Isolated Analog Output Module Redundant ownership lets a single controller use redundant adapters to Redundant Owners communicate with a single output or lets two separate controllers coordinate to control the output. Configure 1756-OF8I Redundant Owners To enable Redundant Ownership mode in the output module, each connection to the output module is via a redundant owner module definition.
Page 99: About Redundant Owners
Chapter 5 Requirements You must use output modules that support Redundant Owner connections: • 1756-OF8I output module • All Allen-Bradley® 1756 input modules that support multiple module owners Redundant owner supports these ControlLogix 1756 Ethernet modules: • 1756-EN2T • 1756-EN2TR •...
Page 100 Chapter 5 1756-OF8I Isolated Analog Output Module Single Controller Behavior A single controller case is the simpler one as both connections are owned by the same controller. Thus there is never a case where one connection is in Run mode and the other connection is in Program mode, so no need to worry about synchronizing.
Page 101 1756-OF8I Isolated Analog Output Module Chapter 5 That single controller behavior should result in the following: 1. Output is not owned until the Claim connection is made. 2. Any disruption in the Claim connection causes the I/O module to switch to the Ready path.
Page 102 Chapter 5 1756-OF8I Isolated Analog Output Module You can use Produced/Consumed tags for synchronization; however, the Redundant Owner Input tags provide the majority of information needed for synchronization. • After both controllers decide it is safe, the primary controller sets Claim. •...
Page 103: Configure The Output Module
1756-OF8I Isolated Analog Output Module Chapter 5 Configure the Output Module In a redundant owner application, configure one output module as Redundant Owner A and the second as Redundant Owner B. In our example project, Redundant Owner A is the module connected to Ethernet A, and Redundant Owner B is the module connected to Ethernet B.
Page 104 Chapter 5 1756-OF8I Isolated Analog Output Module In the example project the routines are called R001, R002, and so on. One chassis per routine. 6. Add an I/O module to the chassis routines. 7. Insert an Add-On Instruction for each digital input module you have in the chassis.
Page 105: Response Times For Output Modules
1756-OF8I Isolated Analog Output Module Chapter 5 Response Times for Output Modules Response time to a change in ownership is from the time the event takes place until the time that the output modules uses the connection data from the redundant connection.
Page 106: Input Modules
Analog Input, 8-channel current Must be used in 1756-IF6I compatibility mode. You will lose or voltage isolated 2 channels and all of the new features of the 1756-IF8I module. Use the 1756-IF8I in remote I/O chassis and 1756-IF6I in Logix Designer I/O Configuration.
Page 107: Troubleshooting
1756-OF8I Isolated Analog Output Module Chapter 5 Troubleshooting Issue: I/O Module Connection Error or I/O Module Configuration Error (yellow triangle in Logix Designer I/O configuration) 1. Verify that both entries in the Logix Designer I/O Configuration have the same RPI. 2.
Page 108 Chapter 5 1756-OF8I Isolated Analog Output Module Issue: Incorrect output behavior on response 1. Verify that only one of the connections to the Output module has the .OwnerClaim output set to true (1). 2. Verify that only one of the connections to the Output module has the .OwnerReady output set to true (1).
Page 109: I/O Modules Key The Removable Terminal Block
Chapter Install ControlLogix Analog I/O Modules Topic Page Install the I/O Module Key the Removable Terminal Block Connect Wiring Assemble the RTB and the Housing Choose Extended-depth Housing Install the Removable Terminal Block Remove the Removable Terminal Block Remove the Module from the Chassis This chapter assumes that you have already installed a 1756 ControlLogix®...
Page 110: Chapter 6
Chapter 6 Install ControlLogix Analog I/O Modules North American Hazardous Location Approval The following information applies when operating this equipment in Informations sur l’utilisation de cet équipement en environnements hazardous locations. dangereux. Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class Les produits marqués "CL I, DIV 2, GP A, B, C, D"...
Page 111: Install The I/O Module
Install ControlLogix Analog I/O Modules Chapter 6 WARNING: • This equipment shall be mounted in an ATEX-certified enclosure with a minimum ingress protection rating of at least IP54 (as defined in IEC60529) and used in an environment of not more than Pollution Degree 2 (as defined in IEC 60664-1) when applied in Zone 2 environments.
Page 112 Chapter 6 Install ControlLogix Analog I/O Modules ATTENTION: Prevent Electrostatic Discharge This equipment is sensitive to electrostatic discharge, which can cause internal damage and affect normal operation. Follow these guidelines when you handle this equipment: • Touch a grounded object to discharge potential static. •...
Page 113: Key The Removable Terminal Block
Install ControlLogix Analog I/O Modules Chapter 6 2. Slide the module into the chassis until the module locking tab clicks. Locking tab 20862-M Key the removable terminal block (RTB) to prevent inadvertently connecting the Key the Removable wrong wiring in the RTB to your module. Wedge- and U-shaped bands are Terminal Block manually inserted into the RTB and module.
Page 114: Connect Wiring
We recommend that you use Belden 8761 cable when wiring the RTB for the IMPORTANT following ControlLogix analog modules: • 1756-IF8I • 1756-OF8I • 1756-IRT8I on points that use the Thermocouple functionality We recommend that you use Belden 9533 or 83503 cable with the 1756-IRT8I module on points that use the RTD functionality.
Page 115: Connect The Grounded End Of The Cable
If you cannot ground the module shield and drain wires at field-side, ground them at an earth ground on the chassis. We recommend that you always ground the 1756-IF8I module at an earth ground on the chassis when you use the module’s current sourcing functionality.
Page 116: Connect The Ungrounded End Of The Cable
Chapter 6 Install ControlLogix Analog I/O Modules 4. Attach a ground lug and apply heat shrink tubing to the exit area. 45080 5. Connect the drain wire to a chassis mounting tab. Use any chassis mounting tab that is designated as a functional signal ground.
Page 117: Rtb Types
Install ControlLogix Analog I/O Modules Chapter 6 RTB Types Each RTB comes with housing. The following RTB types work with ControlLogix analog I/O modules: Cage Clamp RTB - Catalog Number 1756-TBCH • Spring Clamp RTB - Catalog Number 1756-TBS6H • ATTENTION: Consider the following when using the 1756-TBCH RTB: •...
Page 118: Rtb Wiring Recommendations
Chapter 6 Install ControlLogix Analog I/O Modules Spring Clamp RTB - Catalog Number 1756-TBS6H 1. Strip 11 mm (7/16 in.) maximum length of wire. 2. Insert the screwdriver into the outer hole of the RTB to depress the spring- loaded clamp. 3.
Page 119: Assemble The Rtb And The Housing
Install ControlLogix Analog I/O Modules Chapter 6 Removable housing covers the wired RTB to protect wiring connections when Assemble the RTB and the the RTB is seated on the module. Housing 1. Align the grooves at the bottom of each side of the housing with the side edges of the RTB.
Page 120: Choose Extended-Depth Housing
Chapter 6 Install ControlLogix Analog I/O Modules There are two housing options available when wiring your ControlLogix analog Choose Extended-depth I/O module: Housing • Standard-depth housing • Extended-depth housing When you order an RTB for your I/O module, you receive standard-depth housing.
Page 121: Cabinet Size Considerations With Extended-Depth Housing
Install ControlLogix Analog I/O Modules Chapter 6 Cabinet Size Considerations with Extended-depth Housing When you use extended-depth housing, catalog number 1756-TBE, the I/O module depth is increased. The diagram shows the difference in depth between an I/O module using standard-depth housing and one using extended-depth housing.
Page 122: Install The Removable Terminal Block
Chapter 6 Install ControlLogix Analog I/O Modules These steps show how to install the RTB onto the module to connect the wiring. Install the Removable Terminal Block WARNING: When you connect or disconnect the removable terminal block (RTB) with field-side power applied, an electrical arc can occur. This could cause an explosion in hazardous location installations.
Page 123: Remove The Removable Terminal Block
Install ControlLogix Analog I/O Modules Chapter 6 2. Press quickly and evenly to seat the RTB on the module until the latches snap into place. 3. Slide the locking tab down to lock the RTB onto the module. 20854-M If you need to remove the module from the chassis, you must first remove the Remove the Removable RTB from the module.
Page 124: Remove The Module From The Chassis
Chapter 6 Install ControlLogix Analog I/O Modules Complete the following steps to remove the RTB. 1. Unlock the locking tab at the top of the module. 2. Open the RTB door by using the bottom tab. 3. Hold the spot marked PULL HERE and pull the RTB off the module. 20855-M IMPORTANT Do not wrap your fingers around the entire door.
Page 125 Chapter Configure ControlLogix Analog I/O Modules Topic Page Create a New Module Edit the Configuration Copy Channel Configuration View the Module Tags This chapter describes how to configure your module with Studio 5000 IMPORTANT Logix Designer® application, version 21 and later. You can use the ControlLogix®...
Page 126: Chapter 7 Create A New Module
Chapter 7 Configure ControlLogix Analog I/O Modules After you create a Logix Designer application project, complete the following Create a New Module steps to create a module in the project. 1. Right-click I/O Configuration and choose New Module. 2. Select the module and click Create. 3.
Page 127 Configure ControlLogix Analog I/O Modules Chapter 7 4. On the General tab, name the module. Make sure that the Slot number in the configuration matches the physical slot number of the chassis housing the module. The Description field is optional. 5.
Page 128: Module Definition
Chapter 7 Configure ControlLogix Analog I/O Modules Module Definition On the General tab, click Change … to access the Module Definition dialog box. The following parameters are available on the Module Definition dialog box: • Series - Module hardware series •...
Page 129: Edit The Configuration
• Time Sync The following tabs show fields specific to the module type: • Configuration • Calibration • Alarm Configuration - Available with only the 1756-IF8I and 1756-IRT8I modules. • CJ Configuration - Available with only the 1756-IRT8I and 1756-IT16 module.
Page 130: Connection Tab
Chapter 7 Configure ControlLogix Analog I/O Modules Connection Tab The Connection tab lets you complete the following tasks: • Set the RPI rate. For more information about the RPI, see page • Inhibit the module. For more information on inhibiting the module, see page •...
Page 131: Configuration Tab
• Select an input or output type. • Select a module’s operating range. • Define scaling parameters. 1756-IF8I Module For information on this tab’s configurable parameters, see Chapter 3, 1756-IF8I Isolated Analog Input Module on page...
Page 132 Chapter 7 Configure ControlLogix Analog I/O Modules 1756-IRT8I Module For information on this tab’s configurable parameters, see Chapter 4, Temperature-sensing Analog Modules on page 1756-IR12 Module For information on this tab’s configurable parameters, see Chapter 4, Temperature-sensing Analog Modules on page Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 133 Configure ControlLogix Analog I/O Modules Chapter 7 1756-IT16 Module For information on this tab’s configurable parameters, see Chapter 4, Temperature-sensing Analog Modules on page 1756-OF8I Module For information on this tab’s configurable parameters, see Chapter 5, 1756-OF8I Isolated Analog Output Module on page IMPORTANT: Changes to the High Engineering and Low Engineering values do not automatically change the Clamp values on the Limit Configuration tab.
Page 134: Calibration Tab
The analog I/O modules do not require recalibration after operating in an IMPORTANT application. For information on how to configure each module type, see Chapter 8, Calibrate the ControlLogix Analog I/O Modules on page 143. 1756-IF8I Module Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 135 Configure ControlLogix Analog I/O Modules Chapter 7 1756-IRT8I Module 1756-IR12 Module Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 136 Chapter 7 Configure ControlLogix Analog I/O Modules 1756-IT16 Module 1756-OF8I Module Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 137: Alarm Configuration Tab
Configure ControlLogix Analog I/O Modules Chapter 7 Alarm Configuration Tab The 1756-IF8I and 1756-IRT8I modules support alarms. The fields on the Alarm Configuration tab are specific to the module type. The following are examples of tasks you complete via this tab: •...
Page 138 Chapter 7 Configure ControlLogix Analog I/O Modules 1756-IRT8I Module For information on this tab’s configurable parameters, see Chapter 4, Temperature-sensing Analog Modules on page CJ Configuration Tab The CJ Configuration tab is available with the 1756-IRT8I and 1756-IT16 modules. You use this tab to configure the cold junction compensation option. IMPORTANT: If all channels on the module use the RTD input type, the Cold Junction Disable...
Page 139: Limit Configuration Tab
Module Properties dialog box and copy them to other channels. Copy Channel Configuration is available on the Module Properties dialog box tabs as follows for the ControlLogix analog I/O modules: • 1756-IF8I, 1756-IRT8I, 1756-IR12, 1756-IT16 modules: – Configuration tab – Alarm Configuration tab •...
Page 140 2. Access the Module Properties dialog box. 3. Click the Configuration tab and make the required configuration changes. In this example, the channel 0 configuration for a 1756-IF8I module is copied to all other channels on the module. 4. Click Copy Channel Configuration.
Page 141: View The Module Tags
Configure ControlLogix Analog I/O Modules Chapter 7 6. Click OK or Apply for the new channel configuration to take effect. If desired, you can apply configuration changes to the first channel, as described in step 3, before moving to the next step and copying channel configuration.
Page 142 Chapter 7 Configure ControlLogix Analog I/O Modules Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 143 Chapter Calibrate the ControlLogix Analog I/O Modules Topic Page Difference between Calibrating an Input Module and an Output Module Calibrate the Input Modules Calibrate the Output Module The ControlLogix® analog I/O modules are calibrated during the manufacturing process. Each module’s accuracy remains high throughout its lifespan. You are not required to calibrate the module at any point in its lifespan.
Page 144: Difference Between Calibrating An Input Module
DMM can also be used to adjust a voltage/current calibrating source to its value. Table 23 - Calibration Instrumentation Specifications Module Channel Input Type Recommended Instrument Specifications 1756-IF8I Current (mA) 1.00…20.00 mA source ±100 nA current Voltage (V) 0…10V source ±2 μV voltage 1.0…487.0 Ω...
Page 145: Calibrate Via Profile Or Ladder
Calibrate the 1756-IF8I Module Via the Profiles Calibrate the Temperature-sensing Modules Calibrate the 1756-IF8I Module Via the Profiles You can calibrate the 1756-IF8I module for use with the following input types: • Current (mA) Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 146 Chapter 8 Calibrate the ControlLogix Analog I/O Modules • Voltage (V) This section shows how to calibrate the 1756-IF8I modules for use with only IMPORTANT voltage inputs. The calibration process is generally the same if you calibrate the module for use with current inputs except for the following differences: •...
Page 147 Calibrate the ControlLogix Analog I/O Modules Chapter 8 3. Right-click the module you want to calibrate and choose Properties. 4. On the Configuration tab, make sure the Input Type for each channel to be calibrated is set to Voltage (V). The input range selection does not impact calibration.
Page 148 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 7. When the warning appears, click OK. 8. Select the channels to be calibrated and click Next. The Attach Low Reference Voltage Signals dialog box appears, as shown below. It indicates the channels are calibrated for a low reference and the range of the calibration.
Page 149 Calibrate the ControlLogix Analog I/O Modules Chapter 8 11. If channels are OK, click Next. If any channel reports an error, return to step 9 and click Retry until the status is OK. If the error persists indefinitely, click Stop to exit calibration. The channel remains calibrated to the accuracy level achieved at factory calibration.
Page 150: Calibrate The Temperature-Sensing Modules
Chapter 8 Calibrate the ControlLogix Analog I/O Modules 14. If channels are OK, click Next. If any channel reports an error, return to step 12 and click Retry until the status is OK. If the error persists indefinitely, click Stop to exit calibration. The channel remains calibrated to the accuracy level achieved at factory calibration.
Page 151 Calibrate the ControlLogix Analog I/O Modules Chapter 8 Calibrate the Module for an RTD Input Type The module uses two precision resistors to calibrate the channels in ohms. You connect the following: • 1 Ω precision resistor for low reference calibration •...
Page 152 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 4. Make sure that the controller is in Program Mode or the Connection is Inhibited (available via the Connection tab). The 1756-IRT8I, 1756-IR12, and 1756-IT16 modules can only be calibrated when the Connection is Inhibited. 5.
Page 153 Calibrate the ControlLogix Analog I/O Modules Chapter 8 8. Connect a 1 Ω precision resistor to all module channels being calibrated. After you connect the precision resistor, we recommend that you wait IMPORTANT for a minimum of two minutes before proceeding to the next task to obtain the highest calibration accuracy.
Page 154 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 12. Click Next. The Group High Reference Results dialog box indicates the status of each channel after calibrating for a high reference. 13. If channels are OK, click Next. If any channel reports an error, return to step 11 and click Retry until the status is OK.
Page 155 Calibrate the ControlLogix Analog I/O Modules Chapter 8 Calibrate the Module for a Thermocouple Input Type The 1756-IRT8I module channels configured for Thermocouple inputs perform IMPORTANT a wire resistance self-calibration when the module power is cycled. Follow these steps to calibrate your module. 1.
Page 156 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 6. On the Calibration tab, click Start Calibration. 7. When the warning appears, click OK. 8. Select the channels to be calibrated and click Next. The Attach Low Reference Voltage Signals dialog box appears, as shown below.
Page 157 Calibrate the ControlLogix Analog I/O Modules Chapter 8 10. Click Next. The Group Low Reference Results dialog box appears, as shown below. It indicates the status of each channel after calibrating for a low reference. 11. If channels are OK, click Next. If any channel reports an error, return to step 9 and click Retry until the...
Page 158: Calibrate The Output Module
Chapter 8 Calibrate the ControlLogix Analog I/O Modules The Group High Reference Results dialog box indicates the status of each channel after calibrating for a high reference. 14. If channels are OK, click Next. If any channel reports an error, return to step 12 and click Retry until the status is OK.
Page 159: For A Current Output Type
Calibrate the ControlLogix Analog I/O Modules Chapter 8 Calibrate the 1756-OF8I Module for a Current Output Type When calibrating an output channel for use with a current output type, the Logix Designer application commands the module to output specific levels of current. You must measure the actual level and record the results to account for any module inaccuracies.
Page 160 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 6. On the Calibration tab, click Start Calibration. 7. When the warning appears, click OK. 8. Select the channels to be calibrated and click Next. The Output Reference Signals dialog box appears. It indicates the channels are calibrated for a low reference and the calibration range.
Page 161 Calibrate the ControlLogix Analog I/O Modules Chapter 8 9. Click Next. The Measure and Record Values dialog box appears. 10. For each channel being calibrated, use your current meter to measure the reference value of each channel individually. 11. In the Recorded Reference (mA) column record the measured value for each channel that was recorded and click Next.
Page 162 Chapter 8 Calibrate the ControlLogix Analog I/O Modules 13. Click Next. The Measure and Record Values dialog box appears. 14. For each channel being calibrated, use your current meter to measure the reference value of each channel individually. 15. In the Recorded Reference (mA) column record the measured value for each channel that was recorded and click Next.
Page 163 Calibrate the ControlLogix Analog I/O Modules Chapter 8 17. Click Finish. Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 164 Chapter 8 Calibrate the ControlLogix Analog I/O Modules Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 165: Status Indicators For The 1756-If8I Module
Chapter Troubleshoot Your Module Topic Page Status Indicators for the 1756-IF8I Module Status Indicators for the 1756-IRT8I Module Status Indicators for the 1756-IR12 Module Status Indicators for the 1756-IT16 Module Status Indicators for the 1756-OF8I Module Use Logix Designer Application for Troubleshooting Troubleshoot Incorrect Readings on the Module ControlLogix®...
Page 166: Status Indicators For The 1756-Irt8I Module
Chapter 9 Troubleshoot Your Module Status Indicators for the 1756-IRT8I Module Indicator Status Description Steady green The module is in a normal operating state in Run mode. Flashing green The module passed internal diagnostics and is not actively controlled or the connection is open and the controller is in Program mode.
Page 167: Status Indicators For The 1756-It16 Module
Troubleshoot Your Module Chapter 9 Status Indicators for the 1756-IT16 Module Indicator Status Description Steady green The module is in a normal operating state in Run mode. Flashing green The module passed internal diagnostics and is not actively controlled or the connection is open and the controller is in Program mode.
Page 168: Use Logix Designer Application For Troubleshooting
Chapter 9 Troubleshoot Your Module The Logix Designer application indicates fault conditions in the following ways: Use Logix Designer Application for • Warning signal on the main screen next to the module - This occurs when Troubleshooting the connection to the module is broken. •...
Page 169: Fault Type Determination
Troubleshoot Your Module Chapter 9 • Notification in the Tag Editor - General module faults are also reported in the Tag Editor. Diagnostic faults are reported only in the Tag Editor. The Value field indicates a fault with the number 1. Fault Type Determination When you are monitoring a module’s configuration properties in the Logix Designer application and receive a Communication fault message, the...
Page 170: Troubleshoot Incorrect Readings On The Module
• 1756-IRT8I and 1756-IT16 Modules - Incorrect Temperature Readings • 1756-IRT8I and 1756-IR12 Modules - Incorrect RTD Readings • 1756-IF8I Module - Incorrect Input Voltage/Current Readings • 1756-OF8I Module - Incorrect Output Voltage/Current Readings 1756-IRT8I and 1756-IT16 Modules - Incorrect Temperature Readings To determine the cause of the incorrect reading, first determine the nature of the incorrect reading.
Page 171 Troubleshoot Your Module Chapter 9 – The CJC sensors, if being used, are installed correctly. Remember, if you choose to use CJC sensors with the module, you must IMPORTANT use the sensors at both connection positions, that is, the top and bottom of the module.
Page 172 Chapter 9 Troubleshoot Your Module If the previously listed tasks fail to resolve your issue with incorrect temperature readings on your module, use the following table. Table 24 - Troubleshoot Incorrect Temperature Readings Possible Cause of Incorrect Description Recommended Action Reading Open circuit A thermocouple reading maximum (upscale) usually means that...
Page 173: Incorrect Rtd Readings
Troubleshoot Your Module Chapter 9 1756-IRT8I and 1756-IR12 Modules - Incorrect RTD Readings To determine the cause of the incorrect reading, first determine the nature of the incorrect reading. For example, the module can perform as follows: • The module always reads maximum. •...
Page 174 Chapter 9 Troubleshoot Your Module If the previously listed tasks fail to resolve your issue with incorrect RTD readings on your module, use the following table. Table 25 - Troubleshoot Incorrect RTD Readings Possible Cause of Incorrect Description Recommended Action Reading Wire Off When using a 3-wire RTD...
Page 175: Incorrect Input Voltage/Current Readings
• Channel configured for correct range. • Signal and Engineering units are set correctly and equal. 1756-IF8I Module - Incorrect Input Voltage/Current Readings To determine the cause of the incorrect reading, first determine the nature of the incorrect reading. For example, the module can perform as follows: •...
Page 176 If the previously listed tasks fail to resolve your issue with incorrect voltage or current readings on your module, use the following table. Table 26 - 1756-IF8I Module - Troubleshoot Incorrect Input Voltage/Current Readings Possible Cause of Incorrect Description...
Page 177 Troubleshoot Your Module Chapter 9 Table 26 - 1756-IF8I Module - Troubleshoot Incorrect Input Voltage/Current Readings (continued) Possible Cause of Incorrect Description Recommended Action Reading Electrical noise Erratic readings, that is, data fluctuating more than is typical, are a • Disconnect all but one input to see if channels are affecting each cause of noise.
Page 178: Incorrect Output Voltage/Current Readings
Chapter 9 Troubleshoot Your Module 1756-OF8I Module - Incorrect Output Voltage/Current Readings To determine the cause of the incorrect reading, first determine the nature of the incorrect reading. For example, the module can perform as follows: • The module always outputs maximum. •...
Page 179: Rockwell Automation Publication 1756-Um540E-En-P - December
Troubleshoot Your Module Chapter 9 If the previously listed tasks fail to resolve your issue with incorrect voltage or current readings on your module, use the following table. Table 27 - 1756-OF8I Module - Troubleshoot Incorrect Input Voltage/Current Readings Possible Cause of Incorrect Description Recommended Action Output...
Page 180 Chapter 9 Troubleshoot Your Module Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 181: Access The Tags
Appendix Analog I/O Module Tag Definitions Topic Page Access the Tags 1756-IF8I Module Tags 1756-IRT8I Module Tags 1756-IR12 Module Tags 1756-IT16 Module Tags 1756-OF8I Module Tags Redundant Owner Configuration Tags Array Data Structures Module tags are created when you add a module to the Studio 5000 Logix Designer®...
Page 182 Appendix A Analog I/O Module Tag Definitions 3. Open the tags as needed to view specific tags. Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 183: 1756-If8I Module
Analog I/O Module Tag Definitions Appendix A This section describes the tags associated with the 1756-IF8I module. 1756-IF8I Module Tags Each application’s series of tags varies but no input module application IMPORTANT contains any tags that are not listed here.
Page 184 Appendix A Analog I/O Module Tag Definitions Table 28 - 1756-IF8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].LowSignal REAL Signal value that lets you scale signal units (V, mA) into Any value that is less than the Engineering Units.
Page 185: Input Tags
Analog I/O Module Tag Definitions Appendix A Input Tags The following table describes the Input tags associated with the 1756-IF8I module. Table 29 - 1756-IF8I Module - Input Tags Tag Name Data Type Definition Valid Values Fault DINT Standard Analog Fault mask – controller sets all 32 bits on •...
Page 186 Appendix A Analog I/O Module Tag Definitions Table 29 - 1756-IF8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].HAlarm BOOL Triggered when the I.Ch[x].Data tag value is greater than • 0 = Alarm is not triggered the C.Ch[x].HAlarmLimit tag value.
Page 187 Analog I/O Module Tag Definitions Appendix A Table 29 - 1756-IF8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].Data REAL Channel data in scaled Engineering Units. Any positive or negative value. Determined by how you set the scaling parameters on the channel.
Page 188: Output Tags
Appendix A Analog I/O Module Tag Definitions Output Tags The following table describes the Output tags associated with the 1756-IF8I module. Table 30 - 1756-IF8I Module - Output Tags Tag Name Data Type Definition Valid Values Ch[x].LLAlarmEn BOOL Enables the Low Low Process alarm.
Page 189: 1756-Irt8I Module Tags
Analog I/O Module Tag Definitions Appendix A Table 30 - 1756-IF8I Module - Output Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].CalLowReference BOOL Rising edge triggers the Low Calibration at the Low • 0 = Do not sample the Low Reference Point for the current C.Ch[x].InputRange tag...
Page 190 Appendix A Analog I/O Module Tag Definitions Table 31 - 1756-IRT8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].SensorType SINT Sensor type used on the channel. The Input Type If an RTD input type is connected to connected to the channel determine the sensor type.
Page 191 Analog I/O Module Tag Definitions Appendix A Table 31 - 1756-IRT8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x]. TempEnglish BOOL Used with the TempAbsolute tag for the same channel to • 0 = Standard (default) determine the temperature units for the channel when •...
Page 192: Input Tags
Appendix A Analog I/O Module Tag Definitions Table 31 - 1756-IRT8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].LAlarmLimit REAL Low Process Alarm limit 0.0 = default Triggers the I.Ch[x].LAlarm tag when the I.Ch[x].Data tag value is less than this tag’s value Ch[x].HAlarmLimit REAL...
Page 193 Analog I/O Module Tag Definitions Appendix A Table 32 - 1756-IRT8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].Fault BOOL Quality of channel data. • 0 = Good • 1 = Bad Ch[x].Uncertain BOOL Channel data can be imperfect. •...
Page 194: Output Tags
Appendix A Analog I/O Module Tag Definitions Table 32 - 1756-IRT8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].CalGoodHighRef BOOL Indicates that a valid High Reference signal has been • 0 = Valid High Reference signal sampled on this channel.
Page 195 Analog I/O Module Tag Definitions Appendix A Table 33 - 1756-IRT8I Module - Output Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].LLAlarmUnlatch BOOL Unlatches a latched Low Low Alarm at the first instance of • 0 = LLAlarm remains latched the bit transitioning from 0 to 1.
Page 196: 1756-Ir12 Module Tags
Appendix A Analog I/O Module Tag Definitions This section describes the tags associated with the 1756-IR12 module. 1756-IR12 Module Tags Each application’s series of tags varies but no input module application IMPORTANT contains any tags that are not listed here. Configuration Tags The following table describes the Configuration tags associated with the 1756-IR12module.
Page 197 Analog I/O Module Tag Definitions Appendix A Table 34 - 1756-IR12 Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x]. TempEnglish BOOL Used with the TempAbsolute tag for the same channel to determine the temperature units for the channel when •...
Page 198: Input Tags
Appendix A Analog I/O Module Tag Definitions Input Tags The following table describes the Input tags associated with the 1756-IR12 module. Table 35 - 1756-IR12 Module - Input Tags Tag Name Data Type Definition Valid Values Fault DINT Standard Analog Fault mask – controller sets bottom 16 0000…0000= Connection is good bits on connection loss.
Page 199: Output Tags
Analog I/O Module Tag Definitions Appendix A Table 35 - 1756-IR12 Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].CalBadHighRef BOOL Indicates that an invalid High Reference signal has been sampled on this channel. You must correct this condition to successfully calibrate the module.
Page 200: 1756-It16 Module Tags
Appendix A Analog I/O Module Tag Definitions This section describes the tags associated with the 1756-IT16 module. 1756-IT16 Module Tags Each application’s series of tags varies but no input module application IMPORTANT contains any tags that are not listed here. Configuration Tags The following table describes the Configuration tags associated with the 1756-IT16 module.
Page 201 Analog I/O Module Tag Definitions Appendix A Table 36 - 1756-IT16 Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x]. TempEnglish BOOL Used with the TempAbsolute tag for the same channel to • 0 = Standard (default) determine the temperature units for the channel when •...
Page 202: Input Tags
Appendix A Analog I/O Module Tag Definitions Input Tags The following table describes the Input tags associated with the 1756-IT16 module. Table 37 - 1756-IT16 Module - Input Tags Tag Name Data Type Definition Valid Values Fault DINT Standard Analog Fault mask – controller sets bottom 16 0000_0000= Connection is good bits on connection loss.
Page 203: Output Tags
Analog I/O Module Tag Definitions Appendix A Table 37 - 1756-IT16 Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].CalGoodHighRef BOOL Indicates that a valid High Reference signal has been sampled on this channel. Ch[x].CalBadHighRef BOOL Indicates that an invalid High Reference signal has been sampled on this channel.
Page 204: 1756-Of8I Module Tags
Appendix A Analog I/O Module Tag Definitions This section describes the tags associated with the 1756-OF8I module. 1756-OF8I Module Tags Each application’s series of tags varies but no output module application IMPORTANT contains any tags that are not listed here. Configuration Tags Table 38 describes the Configuration tags associated with the 1756-OF8I...
Page 205 Analog I/O Module Tag Definitions Appendix A Table 38 - 1756-OF8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].RampToProg BOOL Enables Output Ramping when the channel is • 0 = Ramping disabled (default) transitioning to Program mode. •...
Page 206: Input Tags
Appendix A Analog I/O Module Tag Definitions Table 38 - 1756-OF8I Module - Configuration Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].LowLimit REAL LowLimit setpoint below which the output cannot go Any lower than the HighLimit when Clamping is enabled. 0.0 = default Ch[x].HighLimit REAL...
Page 207 Analog I/O Module Tag Definitions Appendix A Table 39 - 1756-OF8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].RampAlarm BOOL Indicates that the channel is currently limited to changing • 0 = Channel is not limited to the at the C.Ch[x].MaxRampRate tag value or is latched.
Page 208 Appendix A Analog I/O Module Tag Definitions Table 39 - 1756-OF8I Module - Input Tags (continued) Tag Name Data Type Definition Valid Values Fault DINT Standard Analog Fault mask – controller sets all 32 bits on • 0000_0000= Connection is connection loss.
Page 209: Output Tags
Analog I/O Module Tag Definitions Appendix A Output Tags Table 40 describes the Output tags associated with the 1756-OF8I module. Table 40 - 1756-OF8I Module - Output Tags Tag Name Data Type Definition Valid Values Ch[x].LLimitUnlatch BOOL Unlatches a latched Low Limit alarm at the first instance •...
Page 210 Appendix A Analog I/O Module Tag Definitions Table 40 - 1756-OF8I Module - Output Tags (continued) Tag Name Data Type Definition Valid Values Ch[x].CalOutputHighRef BOOL When set, the channel produces the High Calibration • 0 = Do not Output Cal High Reference Point for the current C.Ch[x].OutputRange tag Reference value.
Page 211: Redundant Owner Configuration Tags
Analog I/O Module Tag Definitions Appendix A The redundant owner configuration tags are identical to the existing 1756-OF8I Redundant Owner configuration. Configuration Tags Redundant Owner Input Tag Layout We added eight Input tags to the existing Input data layout. The bit tag field, PartnerBits, increased from 2 bits to 10 bits to cover OwnerActive, Owner ID, and Active/Claim/Ready status for the A and B controllers.
Page 212: Array Data Structures
Appendix A Analog I/O Module Tag Definitions Fast digital I/O modules use an array data structure. In this type of structure, all Array Data Structures the tags for a particular point are organized under that point. For example, in Figure 33, all of the tags that appear under point 0 also appear under points 1…15 for the input module in slot 1.
Page 213: Appendix B Power-Sizing Chart
The following table lists the current draw of each module. Cat. No. Current Draw at 5.1V DC Current Draw at 24V DC 1756-IF8I 200 mA • Voltage/Non-sourcing Current mode: 150 mA • Sourcing Current mode: 400 mA 1756-IRT8I...
Page 214 Appendix B Choose the Correct Power Supply Use the following table to check power supply consumption. Slot Module Cat. Current @ 5.1V Power @ 5.1V DC Current @ 24V DC Power @ 24 V DC Number DC (mA) (Watts) (mA) (Watts) x 5.1V = x 24V =...
Page 215 Operating Mode AIFM Cat. No. AIFM Cat. No. Pre-wired Cable Cat. No. Fixed Terminal Block RTB Socket Assembly where x = Cable Length 1756-IF8I Current (Internal or External Source 1492-AIFM8S-3 1492-RAIFM8S-3 1492-ACABLExYA Loop Current) Current (External Loop Power only) 1492-AIFM8S-3...
Page 216 Appendix C 1492 Analog Interface Modules Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 217: Index
1756-TBS6H RTB 118 1756-IT16 module 75 cold junction offset 138 disable 77 remote CJ compensator 138 configuration 125 alarm deadband configure 1756-IF8I module 49 1756-IR12 module 67 redundant owner 1756-IRT8I module 67 output module 103 1756-IT16 module 67 connections 129 alarms 137...
Page 218 Index 1756-IRT8I module 138 internal power source 1756-OF8I module 139 1756-IF8I module 42 cold junction compensation 1756-IR12 module 138 1756-IRT8I module 138 1756-IT16 module 138 keying electronic 128 mechanical 113 electronic keying 128 emulation 29 Ethernet modules latch alarms 26...
Page 219 Index 1756-IT16 module 65 1756-IT16 module 71 hold for initialization underrange/overrange detection 1756-OF8I module 91 1756-IF8I module 46 input ranges 1756-IR12 module 65 1756-IF8I module 43 1756-IRT8I module 65 1756-IR12 module 60 1756-IT16 module 65 1756-IRT8I module 60 wire off detection...
Page 220 Index rate limiting 1756-IR12 module 196 1756-IRT8I module 189 1756-IF8I module 137 1756-IT16 module 200 1756-IRT8I module 138 1756-OF8I module 204 1756-OF8I module 90 RSLogix 5000 26 Ready Owner Output 98 troubleshooting 168 redundant owner spring clamp RTB 118 configure...
Page 221 Index voltage input 57 1756-IRT8I module 3-wire RTD input 81 4-wire RTD input 82 thermocouple input 83 1756-OF8I module current output 95 voltage output 96 Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 222 Index Notes: Rockwell Automation Publication 1756-UM540E-EN-P - December 2017...
Page 224 Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, ControlLogix, Integrated Architecture, Logix5000, Rockwell Software, Rockwell Automation, RSLogix 5000, RSLinx, Studio 5000, Studio 5000 Logix Designer, and Studio 5000 Automation Engineering & Design Environment are trademarks of Rockwell Automation, Inc.

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1756-of8i 1756-ir12 1756-it16 1756-irt8i

Allen-Bradley 1756-IF8I User Manual

Preface

Summary of Changes

Chapter 1 Ownership

Chapter 2 Common Analog I/O Features

Analog I/O Module Features

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter 7 Create a New Module

Chapter 8 And an Output Module

Status Indicators for the 1756-IF8I Module

Chapter 9

Appendix A

Appendix B Power-Sizing Chart

Appendix C

Index

Quick Links

Troubleshooting

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Summary of Contents for Allen-Bradley 1756-IF8I

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Table of Contents