11/28/2022 5:49 AM | |
Joined: 8/22/2016 Last visit: 10/30/2023 Posts: 12 Rating: (0) |
Hello everyone, i need help with Modbus RTU communication via CM PtP. I am using CPU315-2PN/DP with IM155-6PN BA over profinet, along with CM PtP module for Modbus RTU communication (RS-485 half duplex). I have attached my program and i am testing it by creating slave device via simulation (Modsim 64 software) and using USB to RS-485 converter. But my communication is not successfull , Comm load block gives Done bit but Modbus Master block dosent give Done bit, it stays in 7002 state thats busy. can anybody give me sample program for this (i need to use simatic manager v5.6) , and tell me if it is correct way to test communication as i dont have any modbus slave device with me. This setup is my office setup, my main task is mentioned below. We want to remove some modbus devices currently connected to CP341 and put them with CM PtP over IM155 profinet, as wer are facing frequent hanging issue with existing CP341 modules. It has S7-400H on top and this system is not commissioned by us. ------------------------------------------------------------------------------------------ AttachmentR3_26112 (2).zip (444 Downloads) |
Last edited by: Jen_Moderator at: 11/28/2022 12:51:15New subject after splitting |
|
11/28/2022 8:05 AM | |
Joined: 4/28/2015 Last visit: 2/7/2024 Posts: 10533 Rating: (820)
|
Hello, here is list of useful Topics also with manuals/documenttaion where you can see how to configure properly your expected cfg. List Forum Topics - ET200SP distributed systems Look to especially to 2-nd Topic in list with communication module cfg: ManualCM PtP - Configurations for point-to-point connections |
Last edited by: Duris_I at: 11/28/2022 08:05:54Last edited by: Duris_I at: 11/28/2022 08:07:12Last edited by: Jen_Moderator at: 11/28/2022 12:53:25Link optimized. With best regards... |
|
11/28/2022 5:01 PM | |
Joined: 8/22/2016 Last visit: 10/30/2023 Posts: 12 Rating: (0) |
thanks i will check it |
Follow us on