1/15/2020 3:25 PM | |
Joined: 2/10/2015 Last visit: 7/4/2024 Posts: 30 Rating: (2) |
Hi, I have almost the same problem. I have a COM LOAD block and two Modbus masters (in an FB so each master has its zone) Communication works but after a while it blocks it. On the second master block the signal remains on BUSY and without error. I tested another method (forcing REQ) The com holds longer but crashes when same after 30min at 3H I have two eurotherm temperature regulator in modbus RTU RS485 at 4800b even 8bit and 1 stop bit Thanks for your help. ------------------------------------------------------------------------------------------ |
Last edited by: Didess at: 01/16/2020 07:54:55Last edited by: The Helping Hand at: 01/17/2020 13:08:20New subject after splitting |
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This contribution was helpful to1 thankful Users |
1/18/2020 2:00 PM | |
Joined: 2/10/2015 Last visit: 7/4/2024 Posts: 30 Rating: (2) |
Hello, If only one slave on the network no fault. The cable is good, the parameters are consistent. The configuration has been running for two days, the only thing is this status 8387 ... Attached the block, do not pay attention to the comentaitres, being tested Thanks :) AttachmentBloc_ModbusRS485.pdf (90 Downloads) |
1/18/2020 2:30 PM | |
Joined: 12/27/2018 Last visit: 9/18/2024 Posts: 510 Rating: (43) |
I had similar problem while I solved it by RESET the REQ in each steps Rrgardless of DONE bit and call another address set REQ. |
Jinson James, M.Tech (Power Electronics and Power System), |
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1/18/2020 3:27 PM | |
Joined: 2/10/2015 Last visit: 7/4/2024 Posts: 30 Rating: (2) |
That is to say another set of addresses? Modbus register address or slave address? |
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