Omron SYSMAC NX Series Startup Manual
Load cell input unit
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Summary of Contents for Omron SYSMAC NX Series
- Page 1 Mac hi ne A utomati on Controll er NX-s eri es Load Cell Input Unit Startup Guide for Weight Measurement NX-RS□□□□ P104-E1-01...
- Page 2 No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without notice. Every precaution has been taken in the preparation of this manual.
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Page 3: Introduction
Introduction The NX-series Load Cell Input Unit Startup Guide for Weight Measurement (hereinafter, may be referred to as “this Guide”) describes the startup procedures for weight measurement in combination with the NJ-series CPU Unit and the basic operating instructions for the Sysmac Studio. -
Page 4: Terms And Conditions Agreement
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. - Page 5 Performance Data Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
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Page 6: Sysmac Studio Automation Software
OMRON will replace defective media without charge. If OMRON is unable to replace defective media or correct the Software, the liability of OMRON and the User’s remedy shall be limited to the refund of the license fee paid to OMRON for the Software. -
Page 7: Precautions
• When building a system, check the specifications for all devices and equipment that will make up the system and make sure that the OMRON products are used well within their rated specifications and performances. Safety measures, such as safety circuits, must be implemented in order to minimize the risks in the event of a malfunction. -
Page 8: Related Manuals
Related Manuals The following manuals are related to this Guide. Use these manuals for reference. Manual name Cat. No. Model numbers Application Description NX-series Load Cell Input P104 NX-RS1201 Learning the startup The startup procedures for a weight Unit Startup Guide for procedures for a weight measuring system using the Weight Measurement... - Page 9 Manual name Cat. No. Model numbers Application Description NJ-series W503 NJ501-□□□□ Learning about the errors Concepts on managing errors that Troubleshooting Manual NJ301-□□□□ that may be detected in an may be detected in an NJ-series NJ-series Controller. Controller and information on individual errors are described.
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Page 10: Revision History
Revision History A manual revision code appears as a suffix to the catalog number on the front and back covers of the manual. P104-E1-01 Cat. No. Revision Revision code Date Revised content April 2016 Original production... -
Page 11: Table Of Contents
CONTENTS Introduction .................. 1 Intended Audience ..................... 1 Applicable Products ....................1 Special Information ....................1 Terms and Conditions Agreement ..........2 Sysmac Studio Automation Software ..............4 Precautions .................. 5 Trademarks ....................... 5 Software Licenses and Copyrights ................ 5 Related Manuals ................ -
Page 12: System To Construct And Configuration Devices
1. System to Construct and Configuration Devices 1.1. System Configuration and Configuration Devices This section describes the system configuration and configuration devices used in this Guide. The system configuration is shown below. This system is a scaling system where a measured material is placed onto the scale to measure its weight. - Page 13 Additional Information Select the load cell’s rated capacity, scale, and measured material so as to satisfy the following relationship: Rated capacity of the load cell ≥ Weight of the scale + Maximum weight of the measured material The table below shows the models of the devices used for explanation in this Guide. When selecting devices for actual use, refer to their respective manuals.
- Page 14 6-conductor type. In addition, the wire resistance should be less than 5 Ω. The table below shows the software, used for explanation in this Guide, to install on the personal computer (OS: Windows 7 64-bit edition). Manufacturer Name Version OMRON Sysmac Studio Version 1.16 or later Corporation...
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Page 15: Applicable Load Cells
1.2. Applicable Load Cells The table below shows the specifications of the NX-RS1201 Load Cell Input Unit used for explanation in this Guide. Select the applicable load cell within the range of specifications as shown in the table. Load cell excitation Input range Connection to load Number of load cell... -
Page 16: Before You Begin
2. Before You Begin 2.1. Wiring the Devices and Installing the Software Wire the devices and install the Sysmac Studio to the personal computer as described in 1.1. System Configuration and Configuration Devices. Additional Information Refer to 3.2 Installing Wiring for the Load Cell Input Unit for how to wire Load Cell Input Unit and a load cell. -
Page 17: Starting Up The Weight Measuring System
3. Starting Up the Weight Measuring System 3.1. Steps to Start Up the Weight Measuring System The steps to start up the weight measuring system using a scale are as follows: Install wiring between the Load Cell Input Installing Wiring for the Load Cell Unit and a load cell. -
Page 18: Installing Wiring For The Load Cell Input Unit
3.2. Installing Wiring for the Load Cell Input Unit This section shows the examples of wiring to a load cell. You can connect the Load Cell Input Unit to a load cell with a 6-wire or 4-wire connection. We recommend that you use a 6-wire connection for connecting the load cell with the Load Cell Input Unit to achieve high-precision measurements. -
Page 19: Wiring Example With 6-Wire Connection
3.2.1. Wiring Example with 6-wire Connection For the connection between a 6-wire load cell and the Load Cell Input Unit, lay the wiring as in the figure below. Shielded cable Terminal block Load cell Load Cell Input Unit ＋IN SIG+ SIG- ＋OUT －OUT... -
Page 20: Wiring Example Of Parallel Connection
Precautions for Correct Use When you use the Load Cell Input Unit with a 4-wire connection, always connect S+ terminal with EXC+ terminal, and S- terminal with EXC- terminal on the terminal block. If they are not connected, the Load Cell Input Unit does not operate normally. 3.2.3. -
Page 21: Performing A Calibration
3.3. Performing a Calibration The measurement of weight and force using the Load Cell Input Unit always requires calibration to be performed before measurement. There are two calibration methods for the Load Cell Input Unit: ・Actual load calibration ・Equivalent input calibration This section describes the overview of each calibration and its procedure. -
Page 22: Performing An Actual Load Calibration
3.3.2. Performing an Actual Load Calibration The following operations are performed for actual load calibration: ・ Basic parameter settings ・ Performing a zero calibration ・ Performing a span calibration ・ Correcting the gravity acceleration as needed This section describes how to perform these operations with the Sysmac Studio. Precautions for Correct Use Before you perform an actual load calibration after the completion of wiring to the load cell, turn ON the power and warm up the system for at least 30 minutes. - Page 23 Click the Transfer to Unit Button. The settings are transferred from the Sysmac Studio to the NX Unit. ● Performing a Zero Calibration This section describes how to perform zero calibration. Before zero calibration, make a state where only a scale is placed on the load cell. Performing zero calibration with only a scale placed on the load cell yields a gross weight value of 0 for this state.
- Page 24 Right-click your Load Cell Input Unit on the Edit Slave Terminal Configuration Tab Page and select Calibration and Data Trace. The following tab page is displayed. Check Stable status in Actual Load Calibration is ON if the stability of the gross weight value is being checked using the stable detection.
- Page 25 ● Performing a Span Calibration This section describes how to perform span calibration. Before span calibration, make a state where a standard load such as a standard weight is placed on the scale. Performing span calibration with a 5 kg standard weight placed on the scale, as shown below, yields a gross weight value of 5, which is the value set as Ch1 Standard Weight.
- Page 26 Right-click your Load Cell Input Unit on the Edit Slave Terminal Configuration Tab Page and select Calibration and Data Trace. The following tab page is displayed. Check Stable status in Actual Load Calibration is ON if the stability of the gross weight value is being checked using the stable detection.
- Page 27 ● Correcting the Gravity Acceleration If the place where actual load calibration is performed for a device is different from the place where the device is installed, a difference in gravity acceleration between these places causes an error in the gross weight value, resulting from conversion by the Load Cell Input Unit, between the calibration place and the installation place.
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Page 28: Performing Equivalent Input Calibration
Set the Ch1 Gravity Acceleration of Calibration Site and Ch1 Gravity Acceleration of Installation Site. Click the Transfer to Unit Button. The settings are transferred from the Sysmac Studio to the NX Unit. 3.3.3. Performing Equivalent Input Calibration The following operations are performed for equivalent input calibration: ・... - Page 29 Set the Ch1 Load Cell Rated Capacity, Ch1 Load Cell Rated Output, and Ch1 Load Cell Zero Balance. The following values are set in this example. Item Setting Unit value － Ch1 Load Cell Rated Capacity 20.0 Ch1 Load Cell Rated Output mV/V μV/V Ch1 Load Cell Zero Balance...
- Page 30 With the Sysmac Studio and the CPU Unit being online, double-click the Communications Coupler Unit to which your Load Cell Input Unit is connected in the Multiview Explorer to open the Edit Slave Terminal Configuration Tab Page. The following tab page is displayed. Right-click your Load Cell Input Unit on the Edit Slave Terminal Configuration Tab Page and select Calibration and Data Trace.
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Page 31: Checking Measurement Values
3.4. Checking Measurement Values This section describes how to check measurement values. In this Guide’s examples for weight measurement, measurement values are checked from the following I/O data: ・Ch1 Gross Weight Value/Force Measurement Value DINT ・Ch1 Gross Weight Value/Force Measurement Value REAL Checking measurement values requires these two I/O data to be allocated in the I/O allocation settings. - Page 32 With the Sysmac Studio and the CPU Unit being offline, double-click the Communications Coupler Unit to which your Load Cell Input Unit is connected in the Multiview Explorer to open the Edit Slave Terminal Configuration Tab Page. The following tab page is displayed. In the Edit Slave Terminal Configuration Tab Page, click your Load Cell Input Unit.
- Page 33 In I/O Entry Mapping List, select Input and then click the Add I/O Entry Button. The following tab page is displayed. Select 0x6003:01 Ch1 Gross Weight Value/Force Measurement Value REAL and then click the OK Button Ch1 Gross Weight Value/Force Measurement Value REAL is added to I/O entries included in the Input Data Set 1.
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Page 34: Checking Measurement Values
Click the Online Button to bring the Sysmac Studio and the CPU Unit online. Online Button Click the Synchronize Button to transfer the configuration from the personal computer to the CPU Unit. Synchronize Button 3.4.2. Checking Measurement Values This section describes how to check measurement values. The measurement values are different between the calibration methods, actual load calibration or equivalent input calibration. - Page 35 Display value = 10 kg Personal computer (Sysmac Studio already installed) Ch1 Gross Weight Value/Force Measurement Value DINT = 10 Measured material Scale (5 kg) 10 kg NX-series Unit power supply Load cell Load Cell Input Unit (NX-RS1201) From the Sysmac Studio’s I/O map, you can check the values of Ch1 Gross Weight Value/Force Measurement Value DINT and Ch1 Gross Weight Value/Force Measurement Value REAL.
- Page 36 With the Sysmac Studio and the CPU Unit being online, from Multiview Explorer, double-click I/O Map to open the I/O map. The following tab page is displayed. On the I/O map that opens, check the values of Ch1 Gross Weight Value/Force Measurement Value DINT and Ch1 Gross Weight Value/Force Measurement Value REAL.
- Page 37 Display value = 15 kg Personal computer (Sysmac Studio already installed) Ch1 Gross Weight Value/Force Measurement Value DINT = 15 Measured material 10 kg Scale (5 kg) NX-series Unit power supply Load cell Load Cell Input Unit (NX-RS1201) Additional Information When performing a calibration by the equivalent input calibration method, if you want to measure the weight value of the measured material excluding the weight of the scale, execute zero set with only the scale placed on a load cell, as in the figure below.
- Page 38 Following the above condition where zero set is performed, placing a measured material on the scale allows the weight value of the measured material to be checked from the I/O data, Ch1 Gross Weight Value/Force Measurement Value DINT and Ch1 Gross Weight Value/Force Measurement Value REAL.
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Page 39: Appendices
4. Appendices 4.1. Features for Stable Measurement The following features are available for the Load Cell Input Unit to perform stable measurement. Make use of them as needed. ● Digital filtering The digital filtering suppresses the fluctuation of measurement values due to the effect of electrical noise and mechanical noise, enabling stable measurement. - Page 40 *1. The Sysmac Library is a suite of software functional components that can be used for programs of the NJ/NX-series Machine Automation Controller. Programming samples and HMI window samples are also available. Download it from our website to install it to the Sysmac Studio for use. http://www.fa.omron.co.jp/sysmac_library...
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- Page 44 Note: Do not use this document to operate the Unit. 2015 P104-E1-01 0416 (0416)