Issue Writing Setpoint on Modbus Device (PLOGIC)

Issue Writing Setpoint on Modbus Device (PLOGIC) - Printable Version

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Issue Writing Setpoint on Modbus Device (PLOGIC) - Gadjoken - 30.04.2025

Hello everyone,
I’m trying to communicate with a Modbus device of type PLOGIC; you’ll find the documentation attached.
I am able to successfully read the ambient temperature status (Address 1156) and the setpoint status (Address 1239) without any issues.
However, when I try to modify the setpoint temperature (Address 1099), I also need to activate both Addresses 1102 and 1103 by setting them to 1. I do this via an event script: when I write 1 to 1102, I also write 1 to 1103 and 22 to 1099.
After 2 seconds, Addresses 1102 and 1103 go back to 0, and nothing happens…
I tried using

Code:
"writable": true

and

Code:
"write_only": true

on both addresses 1102 and 1103, but that didn’t help either.
When I test it using Modbus Doctor, it works fine — I write to 1102, 1103, and 1099 at the same time.
Thank you for your understanding.
Looking forward to your response.

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Daniel - 30.04.2025

It seems you just need to keep 1102 as a value 1 to accept values to 1099, write 1 to 1102 before. Setpoint should be uint16

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Gadjoken - 30.04.2025

Hello Daniel,
Yes indeed, addresses 1102 and 1103 must be set to 1, which I do, but two seconds later they revert to 0 and it's impossible to write the setpoint value.
This doesn't happen when writing the registers via Modbus Doctor

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Daniel - 30.04.2025

Did you try uint16?

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Gadjoken - 30.04.2025

Yes, I changed this setting, but when I enter 1 on 40/3/4 = 1102 and 40/3/5 = 1103, after a few seconds both revert to 0 — see attached screenshot.

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Daniel - 30.04.2025

Try adding write_multiple.

PS. Use this to modify profile:
https://forum.logicmachine.net/showthread.php?tid=5911

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Gadjoken - 30.04.2025

Is the Modbus Profiler app working on a SCHNEIDER SpaceLynk updated to the latest FW version 3.0.0?
Because it's really handy!!
As for the write_multiple, it seems to be working!
Thank you very much!
What exactly does this write_multiple refer to?
Thanks again. Have a great day.

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Daniel - 30.04.2025

Profiler app should work on SL.
Write multiple is forcing SL to use modbus function 16 command for writing to multiple registers even if it writes to a single one.

RE: Issue Writing Setpoint on Modbus Device (PLOGIC) - Gadjoken - 30.04.2025

Noted. Thank you.