Posted 4 Feb 2020 I am using OMRON CJ2M-CPU15 with SCU41-V1 communication module I want to establish communication (rs485 modbus) between omron and Schneider device for reading out electrical parameters. How I can do this? I could not find any manuals and this is becoming very hard for me. I want simply to read few registers from Schneider. Where do I set unit number, starting register, ending register, number of data? I was recently using Siemens and Unitronix and started working with Omron recenlty. Do you have any examples or manuals for this? Thanks in advance Share this post Link to post Share on other sites
Posted 4 Feb 2020 You have not specified all of the hardware that you have. http://www.ia.omron.com/data_pdf/cat/cj1w-scu_ds_e_9_1_csm2151.pdf The Omron will act as a Modbus RTU slave to the Schneider Modbus RTU master. Here is the manual for the Omron communication module.https://assets.omron.eu/downloads/manual/en/v1/w336_cs1_cj1_serial_communications_boards_operation_manual_en.pdf You will find the Modbus addresses on page 58. Modbus-RTU Slave Mode What is the Schneider device that you will use? It must be able to be set up as a Modbus Master. I hope this helps you out. Regards, Garry Share this post Link to post Share on other sites
Posted 9 Feb 2020 On 2/4/2020 at 2:28 PM, gclshortt said: You have not specified all of the hardware that you have. http://www.ia.omron.com/data_pdf/cat/cj1w-scu_ds_e_9_1_csm2151.pdf The Omron will act as a Modbus RTU slave to the Schneider Modbus RTU master. Here is the manual for the Omron communication module.https://assets.omron.eu/downloads/manual/en/v1/w336_cs1_cj1_serial_communications_boards_operation_manual_en.pdf You will find the Modbus addresses on page 58. Modbus-RTU Slave Mode What is the Schneider device that you will use? It must be able to be set up as a Modbus Master. I hope this helps you out. Regards, Garry Thanks, I will try that. That manual seems to be a good for me. I have another question, do you have manual for communication between two omron plcs? CJ2M-CPU15 & CJ2M-CPU13? What communication should I use? Rs232? DO you have pinout for that kind of communication between two plcs. Thanks in advance Share this post Link to post Share on other sites
Posted 13 Feb 2020 https://assets.omron.eu/downloads/manual/en/v4/w465_cs_cj-series_ethernet_ip_units_operation_manual_en.pdf The following section may apply for CJ2M to CJ2M communications: 6-1 Overview of Tag Data Links 6-1-1 Tag Data Links Tag data links enable cyclic data exchanges on an EtherNet/IP network between PLCs or between PLCs and another device. I/O memory addresses (e.g., in the CIO or DM Area) and symbols can be assigned to tags. The settings for tag data links are made using the Network Configurator. The above is for ethernet. You would have to add additional cards. http://forums.mrplc.com/index.php?/topic/37334-omron-cj2m-cpu13-serial-port-communication/https://www.edata.omron.com.au/eData/PLCs/CJ2/W472-E1-14.pdf The above thread will help with serial communication. Regards, Garry Share this post Link to post Share on other sites