Allen-Bradley micrologix 1500 User Manual
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Allen-Bradley micrologix 1500 User Manual

Programmable controllers
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MicroLogix™ 1500
Programmable
Controllers
Bulletin 1764
User Manual

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Summary of Contents for Allen-Bradley micrologix 1500

  • Page 1 MicroLogix™ 1500 Programmable Controllers Bulletin 1764 User Manual...
  • Page 2 Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.
  • Page 3 Summary of Changes The information below summarizes the changes to this manual since the last printing. To help you find new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.
  • Page 4 Summary of Changes Publication 1764-UM001B-EN-P - March 2002...

  • Page 5: Table Of Contents

    Hardware Features ......1-1 MicroLogix 1500 Component Descriptions ... . . 1-2 Base Units .
  • Page 6 Table of Contents Input States on Power Down ....2-6 Other Types of Line Conditions ....2-7 Preventing Excessive Heat .
  • Page 7 Table of Contents Using a Modem ......4-5 Isolated Modem Connection..... 4-5 Connecting to a DF1 Half-Duplex Network .
  • Page 8 Replacement Parts MicroLogix 1500 Replacement Kits....B-1 Lithium Battery (1747-BA) ......B-2 Installing .
  • Page 9 Multi-drop Link ......E-3 Using Modems with MicroLogix 1500 Programmable Controllers ......E-3 Dial-Up Phone Modems .
  • Page 10 Table of Contents Publication 1764-UM001B-EN-P - April 2002...

  • Page 11: Preface

    If you do not, obtain the proper training before using this product. Purpose of this Manual This manual is a reference guide for MicroLogix 1500 controllers. It describes the procedures you use to install, wire, and troubleshoot your controller. This manual: •...
  • Page 12 Preface Read this Document Document Number A technical overview of the MicroLogix 1500 and related MicroLogix 1500 Programmable Controllers 1764-TD001 products Technical Data Information on the MicroLogix 1500 Controllers instruction set MicroLogix 1200 and 1500 Programmable 1762-RM001 Controllers Instruction Set Reference Manual...

  • Page 13: Common Techniques Used In This Manual

    Preface Common Techniques Used The following conventions are used throughout this manual: in this Manual • Bulleted lists such as this one provide information, not procedural steps. • Numbered lists provide sequential steps or hierarchical information. • Italic type is used for emphasis. Rockwell Automation Rockwell Automation offers support services worldwide, with over 75 Sales/Support Offices, 512 authorized Distributors and 260 authorized...

  • Page 14: Your Questions Or Comments On This Manual

    Preface If the problem persists, call your local Rockwell Automation representative or contact Rockwell Automation in one of the following ways: Phone United 1.440.646.5800 States/Canada Outside United You can access the phone number for your States/Canada country via the Internet: 1.

  • Page 15: Hardware Overview

    Chapter Hardware Overview Hardware Features The MicroLogix 1500 programmable controller is composed of a base unit, which contains a power supply, input and output circuits, and a processor. The controller is available with 24 or 28 points of embedded I/O. Additional I/O may be added using Compact™ I/O.

  • Page 16: Micrologix 1500 Component Descriptions

    Hardware Overview MicroLogix 1500 A controller is composed of a processor (1764-LSP or enhanced 1764-LRP with RS-232 port) and one of the base units listed below. Component Descriptions The FET transistor outputs are available on the 1764-28BXB base only. Base Units...

  • Page 17: Processors

    Hardware Overview Processors Processor (Catalog Number 1764-LSP) Processor (Catalog Number 1764-LRP) Communications Port • DTE (male) 9-pin D-shell connector • 30V dc isolation Data Access Tool (Catalog Number 1764-DAT) 1764-DAT mounted on 1764-LSP processor. Publication 1764-UM001B-EN-P - April 2002...

  • Page 18: Memory Modules/Real-Time Clock

    Hardware Overview Memory Modules/Real-Time Clock Memory module mounted on 1764-LSP processor. The following memory modules and real-time clock modules are available: Catalog Number Function Memory Size 1764-RTC Real-Time Clock not applicable 1764-MM1 Memory Module 1764-MM1RTC Memory Module and Real-Time Clock Memory Module 1764-MM2 Memory Module and Real-Time Clock...

  • Page 19: Programming

    Hardware Overview Programming Programming the MicroLogix 1500 programmable controller is done using RSLogix™ 500, Rev. 4.0 or later. Certain features are only available when using the most current version of the software, as noted in System Requirements for Using Expansion Modules on page 1-7.

  • Page 20: Communication Options

    Hardware Overview Communication Options The MicroLogix 1500 can be connected to a personal computer. It can also be connected to the DH-485 network using an Advanced Interface Converter (1761-NET-AIC), to an Ethernet network using an Ethernet Interface (1761-NET-ENI), or to a DeviceNet™ network using a DeviceNet Interface (1761-NET-DNI) or through the DeviceNet Scanner module (1769-SDN).

  • Page 21: Expansion Power Supply And Cables

    To support a maximum of 8 I/O modules in an additional I/O bank, you must have the following: Table 1.3 Requirements to Support a Maximum of 8 I/O Modules Product Catalog Number MicroLogix 1500 1764-LSP, Series A, Revision C or higher Processor 1764-LSP, Series B or higher 1764-LRP, Series B or higher...
  • Page 22 On the Internet, go to http://www.ab.com/micrologix to download the operating system upgrade. Navigate to MicroLogix 1500 for further instructions and downloads. MicroLogix 1500 base units are not field upgradeable from Series A to Series B. Publication 1764-UM001B-EN-P - April 2002...

  • Page 23: Adding An I/O Bank

    System Guidelines A maximum of one 1769 Expansion Cable can be used in a MicroLogix 1500 system, allowing for two banks of I/O modules (one connected directly to the controller, and the other connected via the cable). Each I/O bank requires its own power supply (Bank 1 uses the controller’s embedded power supply).
  • Page 24 1-10 Hardware Overview The following illustrations show a MicroLogix 1500 with an expansion I/O bank. Vertical Orientation Expansion I/O Bank 1 1769-CRRx Expansion Cable Expansion I/O Bank 2 1769-ECL End Cap (1) The x in this catalog number can be either a 1 or a 3 representing the length of the cable: 1 = 1 foot (305 mm) and 3 = 3.28 feet (1 meter).

  • Page 25: Addressing Expansion I/O

    Modules are counted from left to right on each bank as shown in the illustrations below. For more information on addressing, refer to the MicroLogix 1200 and MicroLogix 1500 Programmable Controllers Instruction Set Reference Manual, publication 1762-RM001.
  • Page 26 1-12 Hardware Overview Publication 1764-UM001B-EN-P - April 2002...

  • Page 27: Installing Your Controller

    Chapter Installing Your Controller This chapter shows you how to install your controller system. The only tools you require are a Flat or Phillips head screwdriver and drill. Topics include: • agency certifications • compliance to European Union Directives • using in hazardous locations •...

  • Page 28: Low Voltage Directive

    Programmable Controllers, Part 2 - Equipment Requirements and Tests. For specific information required by EN 61131-2, see the appropriate sections in this publication, as well as the following Allen-Bradley publications: • Industrial Automation Wiring and Grounding Guidelines for Noise Immunity, publication 1770-4.1 •...

  • Page 29: Safety Considerations

    Installing Your Controller Safety Considerations Safety considerations are an important element of proper system installation. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance. We recommend reviewing the following safety considerations. Hazardous Location Considerations This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only.

  • Page 30: Disconnecting Main Power

    Installing Your Controller Use only the following communication cables in Class I, Division 2 hazardous locations. Table 2.1 Cables for Use in Class I, Division 2 Hazardous Environment 1761-CBL-PM02 Series C or later 2707-NC8 Series B or later 1761-CBL-HM02 Series C or later 2707-NC9 Series B or later 1761-CBL-AM00 Series C or later 2707-NC10 Series B or later...

  • Page 31: Power Distribution

    Installing Your Controller Power Distribution There are some points about power distribution that you should know: • The master control relay must be able to inhibit all machine motion by removing power to the machine I/O devices when the relay is de-energized. It is recommended that the controller remain powered even when the master control relay is de-energized.

  • Page 32: Power Supply Inrush

    Installing Your Controller Power Supply Inrush During power-up, the MicroLogix 1500 power supply allows a brief inrush current to charge internal capacitors. Many power lines and control transformers can supply inrush current for a brief time. If the power source cannot supply this inrush current, the source voltage may sag momentarily.

  • Page 33: Other Types Of Line Conditions

    Installing Your Controller power supply shuts down the system. Understanding this concept is important. Write the user program, taking this effect into account. Other Types of Line Conditions Occasionally the power source to the system can be temporarily interrupted. It is also possible that the voltage level may drop substantially below the normal line voltage range for a period of time.

  • Page 34: Master Control Relay

    Installing Your Controller Master Control Relay A hard-wired master control relay (MCR) provides a reliable means for emergency machine shutdown. Since the master control relay allows the placement of several emergency-stop switches in different locations, its installation is important from a safety standpoint. Overtravel limit switches or mushroom-head push buttons are wired in series so that when any of them opens, the master control relay is de-energized.

  • Page 35: Using Emergency-Stop Switches

    Installing Your Controller equipment within the enclosure, use the disconnect to shut off power to the rest of the system. Do not control the master control relay with the controller. Provide the operator with the safety of a direct connection between an emergency-stop switch and the master control relay.

  • Page 36: Schematic (Using Iec Symbols)

    2-10 Installing Your Controller Schematic (Using IEC Symbols) 230V ac Disconnect Fuse 230V ac Circuits Isolation Operation of either ofthese contacts will Transformer remove power from the external I/O circuits, stopping machine motion. 115V ac or 230V ac Emergency-Stop Master Control Relay (MCR) Start Stop Push Button...

  • Page 37: Schematic (Using Ansi/Csa Symbols)

    Installing Your Controller 2-11 Schematic (Using ANSI/CSA Symbols) 230V ac Disconnect Fuse 230V ac Output Circuits Isolation Operation of either ofthese contacts will Transformer remove power from the external I/O 115V ac or 230V ac Emergency-Stop Master Control Relay (MCR) Push Button Start Stop...

  • Page 38: Base Unit Mounting Dimensions

    2-12 Installing Your Controller Base Unit Mounting Dimensions 1764-24AWA 1764-24BWA 1764-28BXB Dimension Height (A) DIN latch open: 138 mm (5.43 in.), DIN latch closed: 118 mm (4.65 in.) Width (B) 168 mm (6.62 in.) Depth (C) 87 mm (3.43 in.) (1) See Controller Dimensions on page A-9 for more dimensional information.

  • Page 39: Mounting The Controller

    Installing Your Controller 2-13 Mounting the Controller Do not remove protective debris strips until after the ATTENTION base and all other equipment in the panel near the base is mounted and wiring is complete. The debris strips are there to prevent drill fragments, wire strands and other dirt from getting into the controller.

  • Page 40: Using A Din Rail

    2-14 Installing Your Controller If additional I/O modules are required for the application, remove the ESD barrier to install expansion I/O modules. A maximum of 16 I/O modules may be connected to the base. (See page 1-7 for system requirements.) The I/O module’s current requirements and power consumption may further limit the number of modules connected to the base.
  • Page 41 Installing Your Controller 2-15 To install your base unit on the DIN rail: 1. Mount your DIN rail. (Make sure that the placement of the base unit on the DIN rail meets the recommended spacing requirements, see Controller Spacing on page 2-12. Refer to the mounting template from the inside back cover of the MicroLogix 1500 Programmable Controller Base Units Installation Instructions, publication 1764-IN001.

  • Page 42: Base Unit Panel Mounting

    To install your base unit using mounting screws: 1. Remove the mounting template from the inside back cover of the MicroLogix 1500 Programmable Controller Base Units Installation Instruction, publication 1764-IN001. 2. Secure the template to the mounting surface. (Make sure your base unit is spaced properly, see Controller Spacing on page 2-12).

  • Page 43: Installing Controller Components

    Installing Your Controller 2-17 Installing Controller Prevent Electrostatic Discharge Components Electrostatic discharge can damage integrated circuits ATTENTION or semiconductors if you touch bus connector pins. Follow these guidelines when you handle any module: • Touch a grounded object to discharge static potential.
  • Page 44 2-18 Installing Your Controller 1. Be sure base unit power is off. 2. Slide the processor into the base unit using the guide rails for alignment. 3. Push until a click is heard. Be careful not to push on the connector when installing the 1764-LRP processor.

  • Page 45: Data Access Tool (Dat)

    Installing Your Controller 2-19 Data Access Tool (DAT) 1. Remove cover from processor. 2. Holding the DAT in the proper orientation (as shown), place the DAT onto processor. Align DAT port on the processor with the plug on the DAT. 3.

  • Page 46: Memory Module/Real-Time Clock

    2-20 Installing Your Controller 4. To remove DAT, grasp using finger areas and pull upward. Memory Module/Real-Time Clock 1. Remove the cover (or DAT if installed) from the processor as shown below. Electrostatic discharge can damage semiconductor ATTENTION devices inside the base and processor units. Do not touch the connector pins or other sensitive areas.
  • Page 47 Installing Your Controller 2-21 2. Align connector on the memory module with the connector pins on the processor. 3. Firmly seat the memory module in the processor making sure the locking tabs click into place. 4. Replace the cover (or DAT if used). Publication 1764-UM001B-EN-P - April 2002...

  • Page 48: Compact I/O

    2-22 Installing Your Controller Compact I/O Attach and Lock Module (Module-to-Controller or Module-to-Module) A Compact I/O module can be attached to the controller or an adjacent I/O module before or after mounting to the panel or DIN rail. The module can be detached and replaced while the system is mounted to a panel or DIN rail.
  • Page 49 2-23 To attach and lock modules: Remove ESD barrier when attaching I/O modules to a MicroLogix 1500 base unit. 1. Disconnect power. 2. Check that the bus lever of the module to be installed is in the unlocked (fully right) position.
  • Page 50 2-24 Installing Your Controller 7. Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before. 8. Lock the end cap bus terminator (6). A 1769-ECR right end cap (or a 1769-ECL left end cap IMPORTANT if I/O bank is located below the controller) must be used to terminate the end of the serial...

  • Page 51: Wiring Requirements

    Chapter Wiring Your Controller This chapter describes how to wire your controller. Topics include: • wiring requirements • using surge suppressors • grounding guidelines • sinking and sourcing circuits • wiring diagrams, input voltage ranges, and output voltage ranges • minimizing noise Wiring Requirements Wire Type Wiring Torque...

  • Page 52: Wiring Recommendation

    Wiring Your Controller Wiring Recommendation Before you install and wire any device, disconnect ATTENTION power to the controller system. Calculate the maximum possible current in each ATTENTION power and common wire. Observe all electrical codes dictating the maximum current allowable for each wire size.
  • Page 53 Wiring with Spade Lugs The diameter of the terminal screw head is 5.5 mm (0.220 in.). The input and output terminals of the MicroLogix 1500 base unit are designed for a 6.35mm (0.25 in.) wide spade (standard for #6 screw for up to 14 AWG) or a 4 mm (metric #4) fork terminal.

  • Page 54: Using Surge Suppressors

    Out 7 24V dc common Suitable surge suppression methods for inductive ac load devices include a varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below. These components must be appropriately rated to suppress the switching transient characteristic of the particular inductive device.
  • Page 55 The suppressors we recommend for triac outputs when switching 120V ac inductive loads are a Harris MOV, part number V175 LA10A, or an Allen-Bradley MOV, catalog number 599-K04 or 599-KA04. Consult the varistor manufacturer’s data sheet when selecting a varistor for your...

  • Page 56: Recommended Surge Suppressors

    Wiring Your Controller Recommended Surge Suppressors Use the Allen-Bradley surge suppressors shown in the following table for use with relays, contactors, and starters. Suppressor Device Coil Voltage Catalog Number Bulletin 509 Motor Starter 120V ac 599-K04 Bulletin 509 Motor Starter...
  • Page 57 Wiring Your Controller This product is intended to be mounted to a well grounded mounting surface such as a metal panel. Refer to the Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for additional information. Additional grounding connections from the mounting tabs or DIN rail, if used, are not required unless the mounting surface cannot be grounded.

  • Page 58: Wiring Diagrams

    Wiring Your Controller Wiring Diagrams This section shows the wiring diagrams for the MicroLogix 1500 controllers. Controllers with dc inputs can be wired as either sinking or sourcing configuration. (Sinking and sourcing does not apply to ac inputs.) See pages 3-12 through 3-15 for sinking and sourcing wiring diagrams.

  • Page 59: Terminal Block Layouts

    Wiring Your Controller Terminal Block Layouts The base unit terminal block layouts are shown below. The shading on the labels indicates how the terminals are grouped. A detail of the groupings is shown in the table following the terminal block layouts. Group 0 Group 1 Group 2...

  • Page 60: Terminal Groupings

    VAC/VDC 4 O/10 and O/11 Sinking and Sourcing Input Any of the MicroLogix 1500 DC embedded input groups can be configured as sinking or sourcing depending on how the DC COM is Circuits wired on the group. See pages 3-12 through 3-15 for sinking and sourcing wiring diagrams.

  • Page 61: 1764-24Awa Wiring Diagram

    Wiring Your Controller 3-11 1764-24AWA Wiring Diagram Input Terminals IN 1 IN 3 IN 6 IN 4 IN 9 IN 11 USED COM 0 COM 2 IN 0 IN 2 COM 1 IN 5 IN 7 IN 8 IN 10 USED L2 L1 “NOT USED”...

  • Page 62: 1764-24Bwa Wiring Diagram With Sinking Inputs

    3-12 Wiring Your Controller 1764-24BWA Wiring Diagram with Sinking Inputs Input Terminals +24V POWER IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 COM 2 COM 0 COM IN 0 IN 2 IN 7 IN 8 IN 5 IN 10 COM 1 Output Terminals...

  • Page 63: 1764-24Bwa Wiring Diagram With Sourcing Inputs

    Wiring Your Controller 3-13 1764-24BWA Wiring Diagram with Sourcing Inputs Input Terminals +24V IN 3 IN 4 IN 6 IN 9 POWER IN 1 IN 11 COM 0 COM 2 COM IN 0 IN 2 IN 5 IN 7 IN 8 IN 10 COM 1 +DC -DC...

  • Page 64: 1764-28Bxb Wiring Diagram With Sinking Inputs

    3-14 Wiring Your Controller 1764-28BXB Wiring Diagram with Sinking Inputs Input Terminals IN 3 IN 4 IN 6 IN 9 IN 13 IN 1 IN 11 IN 15 USED COM 0 COM 2 IN 0 IN 2 IN 7 IN 8 IN 14 IN 5 IN 10...

  • Page 65: 1764-28Bxb Wiring Diagram With Sourcing Outputs

    Wiring Your Controller 3-15 1764-28BXB Wiring Diagram with Sourcing Outputs Input Terminals IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 USED COM 0 COM 2 IN 0 IN 2 IN 7 IN 8 IN 14 IN 5 IN 10...

  • Page 66: Controller I/O Wiring

    To help reduce the effects of environmental noise, install the MicroLogix 1500 system in a properly rated (i.e. NEMA) enclosure. Make sure that the MicroLogix 1500 system is properly grounded.
  • Page 67 Wiring Your Controller 3-17 Transient Pulse Duration as a Function of Load Current 1000 On-State Load Current (mA) Publication 1764-UM001B-EN-P - April 2002...
  • Page 68 3-18 Wiring Your Controller Publication 1764-UM001B-EN-P - April 2002...

  • Page 69: Default Communication Configuration

    • Connecting to DeviceNet • Connecting to Ethernet All devices communicating within a network, must ATTENTION use the same protocol. Default Communication The MicroLogix 1500 has the following default communication configuration. Configuration Table 4.1 DF1 Full-Duplex Configuration Parameters Parameter Default Baud Rate 19.2K...

  • Page 70: Communications Toggle Push Button

    Communication Connections The default configuration is present when: • The controller is powered-up for the first time. • The communications toggle push button specifies default communications (the DCOMM LED is on). • An OS upgrade is completed. For more information about communications, see Understanding Communication Protocols on page E-1.

  • Page 71: Df1 Full-Duplex Communication Parameters

    1 Making a DF1 Full-Duplex Point-to-Point Connection You can connect the MicroLogix 1500 programmable controller to your personal computer using a serial cable from your personal computer’s serial port to the controller, as shown in the illustrations below.
  • Page 72 Channel 0 We recommend using an Advanced Interface Converter (AIC+), catalog number 1761-NET-AIC, or similar optical isolator, as shown below. See page 4-16 for specific AIC+ cabling information. MicroLogix 1500 with 1764-LSP Personal Computer or 1764-LRP processor 1761-CBL-AM00 or 1761-CBL-HM02...

  • Page 73: Using A Modem

    Using a Modem You can use modems to connect a personal computer to one MicroLogix 1500 controller (using DF1 Full-Duplex protocol), or to multiple controllers (using DF1 Half-Duplex protocol), or Modbus Slave RTU protocol, as shown in the following illustration. Do not use DH-485 protocol through modems under any circumstance.
  • Page 74 Communication Connections Constructing Your Own Modem Cable If you construct your own modem cable, the maximum cable length is 15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical pinout for constructing a straight-through cable: AIC+ Optical Isolator Modem or 1764-LRP Channel 1...

  • Page 75: Connecting To A Df1 Half-Duplex Network

    Communication Connections Connecting to a DF1 Half-Duplex Network When a communication port is configured for DF1 Half-Duplex Slave, available parameters include: Table 4.3 DF1 Half-Duplex Configuration Parameters Parameter Options Baud Rate 300, 600, 1200, 2400, 4800, 9600, 19.2K, 38.4K Parity none, even Source ID (Node Address) 0 to 254 decimal...
  • Page 76 Communication Connections DF1 Half-Duplex Master-Slave Network Use this diagram for DF1 Half-Duplex Master-Slave protocol without hardware handshaking. MicroLogix 1500 (DF1 Slave) SLC 5/03 (DF1 Master) 1761-CBL-AM00 or 1761-CBL-HM02 1761-CBL-AP00 or 1761-CBL-PM02 AIC+ AIC+ straight 9-25 straight 9-25 pin cable pin cable...
  • Page 77 DC SOURCE DC SOURCE DC SOURCE CABLE CABLE CABLE EXTERNAL EXTERNAL EXTERNAL MicroLogix MicroLogix MicroLogix 1500 with MicroLogix 1500 with SLC 5/03 (Slave) 1000 (Slave) 1200 (Slave) 1764-LSP or 1764-LRP 1764-LRP Processor (Slave) Processor (Slave) Publication 1764-UM001B-EN-P - April 2002...

  • Page 78: Connecting To A Dh-485 Network

    Communication Connections Connecting to a DH-485 The following network diagrams provide examples of how to connect MicroLogix 1500 controllers to the DH-485 network using the Network Advanced Interface Converter (AIC+, catalog number 1761-NET-AIC). For more information on the AIC+, see the Advanced Interface Converter and DeviceNet Interface Installation Instructions, Publication 1761-5.11.
  • Page 79 Communication Connections 4-11 Typical 3-Node Network (Channel 0 Connection) PanelView 550 PanelView RJ45 port 1761-CBL-AS09 or 1761-CBL-AS03 TERM MicroLogix 1500 with SHLD CHS GND 1764-LSP or 1764-LRP DC SOURCE CABLE Processor EXTERNAL 1747-CP3 or 1761-CBL-AC00 1761-CBL-AM00 or 1761-CBL-HM02 Typical 3-Node Network (Channel 1 Connection)

  • Page 80: Dh-485 Configuration Parameters

    4-12 Communication Connections DH-485 Configuration Parameters When MicroLogix communications are configured for DH-485, the following parameters can be changed: Table 4.4 DF1 Full-Duplex Configuration Parameters Parameter Options Baud Rate 9600, 19.2K Node Address 1 to 31 decimal Token Hold Factor 1 to 4 See Software Considerations on page E-10 for tips on setting the parameters listed above.

  • Page 81: Communication Cable Connection To The Dh-485 Connector

    Communication Connections 4-13 Communication Cable Connection to the DH-485 Connector A daisy-chained network is recommended. We do not recommend the following: Belden #3106A or #9842 Connector Connector Connector Incorrect Single Cable Connection When connecting a single cable to the DH-485 connector, use the following diagram.
  • Page 82 4-14 Communication Connections Multiple Cable Connection When connecting multiple cables to the DH-485 connector, use the following diagram. to Previous Device to Next Device Table 4.6 Connections using Belden #3106A Cable For this Wire/Pair Connect this Wire To this Terminal Shield/Drain Non-jacketed Terminal 2 - Shield...

  • Page 83: Connecting The Aic

    Communication Connections 4-15 End-of-Line Termination Jumper Jumper Belden #3106A or #9842 Cable 1219 m (4000 ft) Maximum Jumper Connecting the AIC+ The AIC+, catalog number 1761-NET-AIC, enables MicroLogix controllers to connect to a DH-485 network when they are configured for DH-485 protocol. The AIC+ has two isolated RS-232 ports and one RS-485 port.
  • Page 84 4-16 Communication Connections Cable Selection Guide 1761-CBL-PM02 1761-CBL-AP00 Cable Length Connections from to AIC+ External Power Power Supply Selection Switch Required Setting 1761-CBL-AP00 45cm (17.7 in) 1764-LRP processor, channel 1 port 2 external 1761-CBL-PM02 2m (6.5 ft) SLC 5/03 or SLC 5/04 processors, channel 0 port 2 external MicroLogix 1000 or 1500...
  • Page 85 Communication Connections 4-17 1747-CP3 1761-CBL-AC00 Cable Length Connections from to AIC+ External Power Power Selection Supply Required Switch Setting 1747-CP3 3m (9.8 ft) 1764-LRP processor, channel 1 port 1 external 1761-CBL-AC00 45cm (17.7 in) SLC 5/03 or SLC 5/04 processor, channel 0 port 1 external PC COM port...
  • Page 86 4-18 Communication Connections 1761-CBL-PM02 (or equivalent) Cable Wiring Diagram 6 8 7 Programming Controller Device 9-Pin D-Shell 8-Pin Mini Din Publication 1764-UM001B-EN-P - April 2002...
  • Page 87 Communication Connections 4-19 Recommended User-Supplied Components The components in Table 4.8 can be purchased from your local electronics supplier. Table 4.8 User Supplied Components Component Recommended Model external power supply and chassis power supply rated for 20.4-28.8V dc ground NULL modem adapter standard AT straight 9-25 pin RS-232 cable see table below for port information if making own...
  • Page 88 Installing and Attaching the AIC+ 1. Take care when installing the AIC+ in an enclosure so that the cable connecting the MicroLogix 1500 controller to the AIC+ does not interfere with the enclosure door. 2. Carefully plug the terminal block into the RS-485 port on the AIC+ you are putting on the network.
  • Page 89 Communication Connections 4-21 Set the DC Power Source selector switch to EXTERNAL before connecting the power supply to the AIC+. The following illustration shows where to connect external power for the AIC+. 24VDC Bottom View NEUT Always connect the CHS GND (chassis ground) ATTENTION terminal to the nearest earth ground.

  • Page 90: Connecting To Devicenet

    4-22 Communication Connections Connecting to DeviceNet You can connect a MicroLogix 1500 using DF1 Full-Duplex protocol to a DeviceNet network using the DeviceNet Interface (DNI), catalog number 1761-NET-DNI. For additional information on using the DNI, refer to the DeviceNet Interface User Manual, publication 1761-6.5.

  • Page 91: Connecting To Ethernet

    Communication Connections 4-23 Connecting to Ethernet You can connect a MicroLogix 1500 to an Ethernet network using the Ethernet Interface (ENI), catalog number 1761-NET-ENI. For additional information on using the ENI, refer to the Ethernet Interface User Manual, publication 1761-UM006. The following figure shows the external wiring connections of the ENI.

  • Page 92: Rs-232 Connections

    4-24 Communication Connections RS-232 Connections Port 2 of the ENI is an 8-pin mini-DIN RS-232 port that provides connection to DF1 compatible RS-232 devices. The connector pin assignments are shown below. 8-pin mini-DIN Port 2 24V dc ground (GND) no connection ENI input data, RxD no connection no connection...

  • Page 93: Using Trim Pots And The Data

    Chapter Using Trim Pots and the Data Access Tool (DAT) Trim Pot Operation The processor has two trimming potentiometers (trim pots) which allow modification of data within the controller. Adjustments to the trim pots change the value in the corresponding Trim Pot Information (TPI) register.

  • Page 94: Trim Pot Information Function File

    Using Trim Pots and the Data Access Tool (DAT) Trim Pot Information Function File The composition of the Trim Pot Information (TPI) Function File is described in the MicroLogix 1200 and MicroLogix 1500 Instruction Set Reference Manual, publication 1762-RM001. Error Conditions...

  • Page 95: Power-Up Operation

    Using Trim Pots and the Data Access Tool (DAT) Feature Function Digital Display Displays address elements, data values, faults and errors. Up/Down Key Selects element numbers and change data values. The up/down key scrolls when held. F1 Key and Indicator Light Controls the F1 status bit.

  • Page 96: Dat Function File

    DAT Function File. The DAT Function File, which is part of the user’s control program, is described in the MicroLogix 1200 and MicroLogix 1500 Instruction Set Reference Manual, publication 1762-RM001. Following a successful power-up sequence, the DAT enters the bit monitoring mode.

  • Page 97: Understanding The Dat Display

    Using Trim Pots and the Data Access Tool (DAT) Understanding the DAT Display When the DAT enters either the bit or integer mode, the element number and its data are displayed, as shown below. The element number is either the integer or bit location. Bit Mode Display Integer Mode Display PROTECTED...

  • Page 98: Entering Bit Mode

    Using Trim Pots and the Data Access Tool (DAT) Entering Bit Mode Bit mode allows you to view and modify up to 48 contiguous bit locations in the controller. The DAT enters the bit mode automatically following a successful power-up. The bit mode can also be selected by pressing the BIT key.

  • Page 99: F1 And F2 Functions

    Using Trim Pots and the Data Access Tool (DAT) 5. Press ENTER to load the new data. Press ESC or INT/BIT to discard the new data. F1 and F2 Functions The function keys, F1 and F2, correspond to bits and can be used throughout the control program as desired.

  • Page 100: Non-Existent Elements

    If you encounter excessive working screen conditions, you can minimize the effect by adding an SVC instruction to the control program. Refer to the MicroLogix 1200 and MicroLogix 1500 Programmable Controllers Instruction Set Reference Manual, publication 1762-RM001, for information on the SVC instruction.

  • Page 101: Error Conditions

    Using Trim Pots and the Data Access Tool (DAT) Pressing ESC while the fault is being displayed returns the DAT to its previous mode. The fault is not removed from the controller, just from the DAT display screen. The fault that was on screen will not display again and cannot be “recalled”.
  • Page 102 5-10 Using Trim Pots and the Data Access Tool (DAT) DAT Error Codes Error Code Description Caused by Recommended Action Interface time-out Communication traffic Add SVC instructions to ladder program 01 to 02 Power-up test failure Internal failure Remove and re-insert the DAT. If failure persists, replace the unit.

  • Page 103: Using Real-Time Clock And Memory Modules

    The real-time clock module can be installed or removed at any time without risk of damage to either the module or the controller. If a module is installed while the MicroLogix 1500 is in an executing mode (Run or Remote Run), the module is not recognized until either a power cycle occurs, or until the controller is placed in a non-executing mode (program mode or fault condition).

  • Page 104: Accuracy

    Using Real-Time Clock and Memory Modules Accuracy The following table indicates the expected accuracy of the real-time clock at various temperatures. Ambient Temperature Accuracy 0°C (+32°F) +34 to -70 seconds/month +25°C (+77°F) +36 to -68 seconds/month +40°C (+104°F) +29 to -75 seconds/month +55°C (+131°F) -133 to -237 seconds/month (1) These numbers are expected worst case values over a 31 day month.

  • Page 105: Memory Module Operation

    Using Real-Time Clock and Memory Modules Use the Disable Clock button in your programming device to disable the real-time clock before storing a module. This decreases the drain on the battery during storage. Table 6.1 RTC Battery Life Expectancy Battery State Temperature Time Duration Operating...

  • Page 106: Program Compare

    (run or remote run) mode. To enable this feature, set the S:2/9 bit in the system status file. Refer to the MicroLogix 1200 and MicroLogix 1500 Instruction Set Reference Manual, publication 1762-RM001, for more information. Data File Download Protection The memory module allows the user to specify individual data files in the controller that are protected from the download procedure.

  • Page 107: Memory Module Write Protection

    The memory module can be installed or removed at any time without risk of damage to either the memory module or the controller. If a memory module is installed while the MicroLogix 1500 is executing, the memory module will not be recognized until either a power cycle occurs, or until the controller is placed in a non-executing mode (program mode or fault condition).
  • Page 108 Using Real-Time Clock and Memory Modules Publication 1764-UM001B-EN-P - April 2002...

  • Page 109: Controller Specifications

    Appendix Specifications Controller Specifications Table A.1 General Specifications Description 1764-24BWA 1764-24AWA 1764-28BXB Number of I/O 12 inputs 12 inputs 16 inputs 12 outputs 12 outputs 12 outputs Line Power 85 to 265V ac 85 to 265V ac 20.4 to 30V dc at 47 to 63 Hz at 47 to 63 Hz Power Supply...

  • Page 110: Choosing A Power Supply

    Specifications Table A.1 General Specifications Description 1764-24BWA 1764-24AWA 1764-28BXB Electrical/EMC The module has passed testing at the following levels: • EN61000-4-2: 4 kV contact, 8 kV air, 4 kV indirect • EN61000-4-3: 10 V/m • EN61000-4-4: 2 kV, 5 kHz; communications cable: 1 kV, 5 kHz •...
  • Page 111 Specifications Figure 1.2 Input Power Required Power Consumption (Watts) Table A.2 Input Specifications Description 1764-24AWA 1764-24BWA and 1764-28BXB Inputs 0 thru 7 Inputs 8 and Higher On-State Voltage 79 to 132V ac 14 to 30.0V dc at 10 to 30.0V dc at Range 30°C (86°F) 30°C (86°F)
  • Page 112 Specifications Table A.3 Response Times for High-Speed dc Inputs 0 Through 7 (applies to 1764-24BWA and 1764-28BXB) Maximum Filter Minimum Maximum Minimum Maximum High-Speed Counter Setting ON Delay ON Delay OFF Delay OFF Delay Frequency at 50% (ms) (ms) (ms) (ms) (ms) Duty Cycle (KHz)
  • Page 113 Specifications The relay current must stay within the limits defined IMPORTANT in Tables A.5 and A.6. Table A.5 Relay Contact Rating Table 1764-24AWA, -24BWA, -28BXB Maximum Amperes Amperes Voltamperes Volts Continuous Make Break Make Break 240V ac 7.5A 0.75A 2.5A 1800VA 180VA 120V ac...
  • Page 114 Specifications Table A.7 1764-28BXB FET Output Specifications Specification General High Speed Operation Operation (Outputs 2 thru 7) (Outputs 2 and 3 Only) Surge Current peak current 4.0A Not Applicable per Point maximum surge 10 msec Not Applicable duration maximum rate of once every second Not Applicable repetition at 30°C...
  • Page 115 Specifications Table A.8 Working Voltage (1764-24AWA) Specification 1764-24AWA Power Supply Input to Backplane Verified by one of the following dielectric tests: 1836V Isolation ac for 1 second or 2596V dc for 1 second 265V Working Voltage (IEC Class 2 reinforced insulation) Input Group to Backplane Verified by one of the following dielectric tests: 151V...

  • Page 116: Transistor Output Transient Pulses

    Specifications Table A.10 Working Voltage (1764-28BXB) Specification 1764-28BXB Input Group to Backplane Verified by one of the following dielectric tests: 1200V Isolation and Input Group to ac for 1 second or 1697V dc for 1 second Input Group Isolation 75V dc Working Voltage (IEC Class 2 reinforced insulation) FET Output Group to Backplane Verified by one of the following dielectric tests: 1200V...

  • Page 117: Controller Dimensions

    Specifications Controller Dimensions See page 2-12 for Base Unit Mounting Dimensions. 168 mm 35 mm (6.62 in) (1.38 in) 147 mm 35 mm (5.79 in) (1.38 in) 13.5 mm 14.7 mm (0.53 in) (0.58 in) Compact I/O Dimensions Panel Mounting For more than 2 modules: (number of modules - 1) X 35 mm (1.38 in.) 28.5 Refer to host controller for this dimension...

  • Page 118: End Cap

    A-10 Specifications End Cap 32 mm (1.26 in.) 18 mm (0.71 in.) 118 mm (4.65 in.) This illustration shows the 1769-ECR right end cap. For the 1769-ECL left end cap, the drawing would be reversed. Dimensions are in mm (inches). Publication 1764-UM001B-EN-P - April 2002...

  • Page 119: Micrologix 1500 Replacement Kits

    This chapter contains the following information: • a table of MicroLogix 1500 replacement parts • procedure for replacing the lithium battery • illustrations of the MicroLogix 1500 replacement doors and terminal blocks MicroLogix 1500 The table below provides a list of replacement parts and their catalog number.

  • Page 120: Lithium Battery (1747-Ba

    Replacement Parts Lithium Battery (1747-BA) When the processor’s Battery Low indicator is lit, IMPORTANT install a backup battery immediately. After the indicator turns on, the battery lasts for at least: • 14 days for the 1764-LSP • 7 days for the 1764-LRP Installing Follow the procedure below to ensure proper replacement battery installation.

  • Page 121: Battery Handling

    Replacement Parts Battery Handling Follow the procedure below to ensure proper battery operation and reduce personnel hazards. • Use only for the intended operation. • Do not ship or dispose of cells except according to recommended procedures. • Do not ship on passenger aircraft. •...

  • Page 122: Disposing

    Replacement Parts Three or More Batteries Procedures for the transportation of three or more batteries shipped together within the United States are specified by the Department of Transportation (DOT) in the Code of Federal Regulations, CFR49, “Transportation.” An exemption to these regulations, DOT - E7052, covers the transport of certain hazardous materials classified as flammable solids.

  • Page 123: Replacement Terminal Blocks

    2 Seaview Blvd. San Diego, CA 92173 Port Washington, NY 11050 (619) 661-4801 (516) 621-4980 Replacement Terminal This figure illustrates how to replace the MicroLogix 1500 terminal blocks. Blocks Catalog Numbers: • 1764-RPL-TB1: 17-point terminal block • 1764-RPL-TB2: 21-point terminal block...

  • Page 124: Replacement Doors

    Replacement Parts Replacement Doors The following figures illustrate the procedure for installing the MicroLogix 1500 replacement doors. Base Terminal Door (1764-RPL-TDR1) Processor Access Door (1764-RPL-CDR1) Base Comms Door (included in 1764-RPL-DR) Trim Pots/Mode Switch Cover Door (included in 1764-RPL-DR) Publication 1764-UM001B-EN-P - April 2002...

  • Page 125: Understanding Controller Leds

    Appendix Troubleshooting Your System This chab pter describes how to troubleshoot your controller. Topics include: • understanding the controller LED status • controller error recovery model • identifying controller faults • calling Rockwell Automation for assistance Understanding Controller The controller status LEDs provide a mechanism to determine the current status of the controller if a programming device is not present LEDs or available.

  • Page 126: When Operating Normally

    Troubleshooting Your System Color Indicates INPUTS input is not energized amber input is energized (logic status) OUTPUTS output is not energized amber output is energized (logic status) (1) When using a 1764-LRP processor, the DCOMM LED applies only to Channel 0. When Operating Normally The POWER and RUN LEDs are on.

  • Page 127: Controller Error Recovery Model

    Troubleshooting Your System Controller Error Recovery Use the following error recovery model to help you diagnose software and hardware problems in the micro controller. The model provides Model common questions you might ask to help troubleshoot your system. Refer to the recommended pages within the model for further help. Identify the error code Is the error Start...

  • Page 128: Identifying Controller Faults

    If the fault condition still exists after cycling power, the controller re-enters the fault mode. For more information on status bits, refer to the MicroLogix 1200 and MicroLogix 1500 Instruction Set Reference Manual, publication 1762-RM001. You can declare your own application-specific major...

  • Page 129: Fault Messages

    Refer to the MicroLogix 1200 and 1500 Instruction Set Reference Manual, publication 1762-RM001, for the controller fault messages that can occur during operation of the MicroLogix 1500 programmable controllers. Each fault message includes the error code description, the probable cause, and the recommended corrective action.
  • Page 130 Troubleshooting Your System Publication 1764-UM001B-EN-P - April 2002...

  • Page 131: Appendix D Preparing For Upgrade

    • a readme first file explaining how to upgrade the operating system Preparing for Upgrade Before upgrading the controller’s operating system, you must: • Obtain the operating system upgrade from http://www.ab.com/micrologix or from your local Allen-Bradley distributor Installing a new operating system deletes the IMPORTANT controller’s user program.

  • Page 132: Performing The Upgrade

    Upgrading Your Operating System Performing the Upgrade The following steps occur during the upgrade process. 1. Controller mode and communications parameters are checked. 2. Download begins. 3. During the download, the Force, Battery, and Comms LEDs perform a walking bit pattern. 4.

  • Page 133: Communication Interface

    See Chapter 4 for information about required network devices and accessories. RS-232 Communication The communications port on the MicroLogix 1500 utilizes an RS-232 interface. RS-232 is an Electronics Industries Association (EIA) Interface standard that specifies the electrical characteristics for serial binary communication.

  • Page 134: Df1 Half-Duplex Protocol

    (including the master) on the DF1 Half-Duplex link. The MicroLogix 1500 can only act as a slave device. A device that can act as a master is required to “run” the network. Several Allen-Bradley products support DF1 Half-Duplex master protocol.

  • Page 135: Considerations When Communicating As A Df1 Slave On A Multi-Drop Link

    The only other way to remove program ownership is to cycle power on the processor. Using Modems with The types of modems that you can use with MicroLogix 1500 controllers include dial-up phone modems, leased-line modems, radio MicroLogix 1500 modems and line drivers.

  • Page 136: Dial-Up Phone Modems

    Dial-Up Phone Modems Some dial-up phone line modems support point-to-point Full-Duplex communications. A MicroLogix 1500 controller, on the receiving end of the dial-up connection, can be configured for DF1 Full-Duplex protocol with or without handshaking. The modem connected to the MicroLogix controller should support auto-answer.

  • Page 137: Radio Modems

    (up to several miles). Line drivers are available in Full- and Half-Duplex models. Allen-Bradley’s AIC+ Advanced Interface Converter is a Half-Duplex line driver that converts an RS-232 electrical signal into an RS-485 electrical signal, increasing the signal transmission distance from 50 to 4000 feet (8000 feet when bridged).

  • Page 138: Dh-485 Token Rotation

    Understanding Communication Protocols The DH-485 protocol supports two classes of devices: initiators and responders. All initiators on the network get a chance to initiate message transfers. To determine which initiator has the right to transmit, a token passing algorithm is used. The following section describes the protocol used to control message transfers on the DH-485 network.

  • Page 139: Devices That Use The Dh-485 Network

    Understanding Communication Protocols Devices that Use the DH-485 Network In addition to the MicroLogix 1500 controllers, the devices shown in the following table also support the DH-485 network. Table E.2 Allen-Bradley Devices that Support DH-485 Communication Catalog Description Installation Function...

  • Page 140: Important Dh-485 Network Planning Considerations

    Understanding Communication Protocols Table E.2 Allen-Bradley Devices that Support DH-485 Communication Catalog Description Installation Function Publication Number 1747-PT1 Hand-Held Provides hand-held programming, monitoring, configuring, and 1747-NP002 Terminal troubleshooting capabilities for SLC 500 processors. 1747-DTAM, DTAM, Panel Mount Provides electronic operator interface for SLC 500 processors.
  • Page 141 Understanding Communication Protocols Hardware Considerations You need to decide the length of the communication cable, where you route it, and how to protect it from the environment where it will be installed. When the communication cable is installed, you need to know how many devices are to be connected during installation and how many devices will be added in the future.
  • Page 142 E-10 Understanding Communication Protocols interference. If you route the cable through conduit, follow these additional recommendations: – Use ferromagnetic conduit near critical sources of electrical interference. You can use aluminum conduit in non-critical areas. – Use plastic connectors to couple between aluminum and ferromagnetic conduit.
  • Page 143 Setting Controller Baud Rate The best network performance occurs at the highest baud rate, which is 19200. This is the default baud rate for a MicroLogix 1500 device on the DH-485 network. All devices must be at the same baud rate. This rate is stored in the controller Communications Status file (CS0:5/8 to CS0:5/15).
  • Page 144 • MicroLogix 1500 controllers can respond to MSG instructions received. • The MicroLogix 1500 controllers can initiate MSG instructions to devices on the DH+ network. • PC can send read and write commands to MicroLogix 1500 controllers. • PC can do remote programming of MicroLogix 1500 controllers. AIC+...

  • Page 145: Modbus Rtu Slave Communication Protocol (Micrologix 1764-Lsp And 1764-Lrp Series B And Later Processors Only

    Read/Write System Status File space Status (S) words 0 to 65 For more information on the MicroLogix 1500 configuration parameters for Modbus Slave RTU (Remote Terminal Unit transmission mode) protocol, refer to the MicroLogix 1200 and 1500 Programmable Controllers Instruction Set Reference Manual, publication 1762-RM001.
  • Page 146 E-14 Understanding Communication Protocols Refer to the MicroLogix 1200 and MicroLogix 1500 Programmable Controllers Instruction Set Reference Manual, publication 1762-RM001 for detailed configuration information. When the driver is set to ASCII, the following parameters can be changed: Table E.4 ASCII Channel Configuration Parameters...

  • Page 147: System Loading Limitations

    An End Cap Terminator (catalog number 1769-ECR or -ECL) is needed for any system using Compact expansion I/O. In a MicroLogix 1500 system, a maximum of one 1769 IMPORTANT expansion cable can be used, allowing for two banks of I/O modules. One bank is connected directly to the controller and the other is connected via the expansion cable.

  • Page 148: Selecting System Devices

    System Loading and Heat Dissipation Selecting System Devices 1. Use Table F.1 to select the processor and optional communications or display devices. Enter a 1 in the “Select Devices” column. 2. Enter the current draw values in the “Calculated Current for System”...
  • Page 149 (3) Maximum value depends on the power supply chosen. (4) Up to 16 modules may be used in a MicroLogix 1500 system when using a Series B Base Unit and Series C processor (up to 8 for Series A Base Units).

  • Page 150: Verifying The System Loading

    System Loading and Heat Dissipation Verifying the System Loading To have a valid system, both current and power requirements must be satisfied. Verifying the Base Unit Loading 1. Enter the SUBTOTAL values from Tables F.1 and F.2. Add the total current draw for the Base Unit. Verify the values are within the maximum limits.
  • Page 151 System Loading and Heat Dissipation Table F.5 Bank 1 Power Supply Loading - Verify the Current Limits Specification Catalog Number Calculated Current for System 24V dc User Output Capacity at 5V dc (mA) at 24V dc (mA) Values from SUBTOTAL2 (Table F.2): MAXIMUM CURRENT LIMIT 1769-PA2 2000...
  • Page 152 System Loading and Heat Dissipation Figure F.2 1769-PA2 Current with +24V dc User Load = 0.2A Valid Operating Range 0.7 0.8 +24V dc Load (Amps) Figure F.3 1769-PA2 Current with +24V dc User Load = 0.25A Valid Operating Range 0.7 0.8 +24V dc Load (Amps) System Using a 1769-PB2 To validate your system, the total 5V dc current and 24V dc current...
  • Page 153 System Loading and Heat Dissipation System Using a 1769-PA4 To validate your system, the total 5V dc current and 24V dc current consumed must be considered. The I/O modules connected to the PB2 should be distributed, such that the current consumed from the left and right side of the power supply never exceeds 2A at 5V and 0.8A at 24V dc with an ambient temperature of 0 to 55 C.
  • Page 154 System Loading and Heat Dissipation Figure 8 1769-PB4 5V and 24V dc Current Total Output: 68W at 55°C or below 61W at 60°C or below 55˚C 55˚C 60˚C 60˚C +24V Bus Load (Amps) Publication 1764-UM001B-EN-P - April 2002...

  • Page 155: Calculating Heat Dissipation

    System Loading and Heat Dissipation Calculating Heat Use this procedure when you need to determine the heat dissipation for installation in an enclosure. Use the following table. Dissipation Catalog Number Heat Dissipation Equation or Constant Calculation Subtotal 1764-24AWA 18W + (0.3 x System Loading) 18W + (0.3 x ______ W) 1764-24BWA 20W + (0.3 x System Loading)

  • Page 156: Publication 1764-Um001B-En-P - April

    F-10 System Loading and Heat Dissipation Publication 1764-UM001B-EN-P - April 2002...
  • Page 157 Glossary The following terms are used throughout this manual. Refer to the Allen-Bradley Industrial Automation Glossary, Publication Number AG-7.1, for a complete guide to Allen-Bradley technical terms. address A character string that uniquely identifies a memory location. For example, I:1/0 is the memory address for data located in Input file word 1, bit 0.
  • Page 158 Glossary communication scan A part of the controller’s operating cycle. Communication with devices (such as other controllers and operator interface devices) takes place during this period. control program User logic (the application) that defines the controller’s operation. controller A device, such as a programmable controller, used to control output devices.
  • Page 159 Expansion I/O is I/O that is connected to the controller via a bus or cable. MicroLogix 1200 controllers use Bulletin 1762 expansion I/O. MicroLogix 1500 controllers use Bulletin 1769 expansion I/O. For MicroLogix controllers, expansion I/O is all I/O residing at slot 1 and higher.
  • Page 160 Glossary half-duplex A mode of communication where data transmission is limited to one direction at a time. hard disk A storage device in a personal computer. high byte Bits 8 to 15 of a word. housekeeping The portion of the scan when the controller performs internal checks and services communications.
  • Page 161 Glossary jump Changes the normal sequence of program execution. In ladder programs a JUMP (JMP) instruction causes execution to jump to a specific rung in the user program. ladder logic A graphical programming format resembling a ladder-like diagram. The ladder logic programing language is the most common programmable controller language.
  • Page 162 Glossary modem Modulator/demodulator. Equipment that connects data terminal equipment to a communication line. modes Selected methods of operation. Example: run, test, or program. negative logic The use of binary logic in such a way that “0” represents the desired voltage level. network A series of stations (nodes) connected by some type of communication medium.
  • Page 163 Glossary offset A continuous deviation of a controlled variable from a fixed point. off-state leakage current When a mechanical switch is opened (off-state), no current flows through the switch. Semiconductor switches and transient suppression components which are sometimes used to protect switches, have a small current flow when they are in the off state.
  • Page 164 Glossary processor A Central Processing Unit. (See CPU.) processor files The set of program and data files resident in the controller. program file Areas within a processor that contain the logic programs. MicroLogix controllers support multiple program files. program mode When the controller is not scanning the control program.
  • Page 165 Glossary reserved bit A location reserved for internal use. retentive data Information (data) that is preserved through power cycles. RS-232 An EIA standard that specifies electrical, mechanical, and functional characteristics for serial binary communication circuits. run mode An executing mode during which the controller scans or executes the logic program.
  • Page 166 Glossary sourcing A term used to describe current flow between two devices. A sourcing device or circuit provides a power. status The condition of a circuit or system. terminal A point on an I/O module that external devices, such as a push button or pilot light, are wired to.
  • Page 167 1764-28BXB sourcing wiring diagram 3-15 4-17 selection guide for the AIC+ 1764-LRP processor selection guide for the DeviceNet 1764-LSP processor 4-22 network calling Allen-Bradley for assistance CE mark certification address channel configuration AIC+ DF1 full-duplex 4-20 applying power to clearing faults...
  • Page 168 Index connecting the system data access tool 4-15 AIC+ hardware overview 4-22, 4-23 2-19 DeviceNet network installing DF1 fullduplex protocol data table 4-10 DH485 network DCD, definition 4-22, 4-23 contactors (bulletin 100), surge DeviceNet Communications suppressors for DeviceNet network 4-22, 4-23 control program connecting 4-22...
  • Page 169 Index errors controller hardware identifying controller faults identifying input device ESC key input scan European Union Directive compliance input specifications input states on power down executing mode inrush current expansion I/O installing hardware overview ControlFlash software your controller installing controller components 2-22 compact I/O F1 Functions...
  • Page 170 Index lithium battery (1747-BA) disposing negative logic handling network installing nominal input current manufacturer normally closed storing normally open transporting null modem cable logic low byte offline offset manuals, related off-state leakage current master control relay one shot master control relay (MCR) online master control relay circuit operating voltage...
  • Page 171 Index program faults response times for high-speed dc inputs determining program file response times for normal dc inputs definition restore program mode retentive data program scan RS-232 communication interface definition RS-232, definition programming device RTU, definition programming the controller run mode required software rung 5-3, 5-5...
  • Page 172 Allen-Bradley for assistance Working Screen Operation working voltage (1764-24AWA) controller error recovery model specifications determining controller faults working voltage (1764-24BWA) identifying controller faults...
  • Page 174 Publication 1764-UM001B-EN-P - April 2002 PN 40072-091-01(2) Supersedes Publication 1764-UM001A-US-P - April 2000 Copyright © 2002 Rockwell Automation. All rights reserved. Printed in the U.S.A.

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