Hello,
iam trying to communicate to Carel controllers and IO modules via Modbus RTU.
The Carel controllers have given network parameters:
Baud Rate: 19200
Data Bits: 8
Stop Bits: 2
Parity: None
Flow Control: None
The IO modules have adjustable parameters. All other configurations are working with the Plasmionique library except for the above named. Like 1 stop bit and odd parity. Even parity even and 1 stop bit is working. So iam assuming that the problem is caused by the second stop bit.
The errorcode is -1073807253: VISA Read in MB Master.lvlib:MB_ADU_RTU.lvclass:RX ADU.vi:4960001->MB Master.lvlib:MB_Master_Serial.lvclass:Querry.vi:3550001->MB Master.lvlib:Read Holding Registers.vi:2420001->MB_Master Comm Tester.vi
I have tried to program an own vi. It works as the Plasmionique Comm Tester for all other parameters except for the above ones.
I also have to mention that the communication with the Carel controllers is working and i have spoken to one of the manufacturer of the IO modules. He said the modules should be fine.
The Carel controllers AND the modules are working with the free program qModMaster.
Does anyone have any idea about what is wrong here?
Thanks for your help.
Albert