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+--- Thread: Modbus ASCII (/showthread.php?tid=4976)
Modbus ASCII - FatMax - 20.09.2023
I have a device connected through Modbus TCP/IP where one of the registers contains FW-version of client. However, datatype is ASCII. Is it possible to poll this with a profile?
RE: Modbus ASCII - Daniel - 20.09.2023
No but you can try reading it via script, use modbus proxy alongside profile.
RE: Modbus ASCII - admin - 20.09.2023
String datatype support has been recently added to profiles. Apart from "datatype": "string" you also need to specify the number of registers to read - "read_count": 6
Null (zero) bytes are automatically removed from the final string value.
RE: Modbus ASCII - FatMax - 20.09.2023
What would be considered newer FW for the SL? I'm on 2.7.0. Edit: Tried to create a profile but the SL responded with invalid field for datatype when it was string.
Tried this:
https://forum.logicmachine.net/showthread.php?tid=1245&pid=7434#pid7434
But just getting an empty string as the result.
RE: Modbus ASCII - admin - 20.09.2023
2.7.0 is not the latest firmware. Try reading these registers via read test, it's quite possible that the version is all zeros.
RE: Modbus ASCII - FatMax - 20.09.2023
The script actually worked fine, but as always I had to subtract 1 from the modbusregister for it to work.
Thank you!