Ben

Hi, thanks for the reply. I managed to get it working using the string. I think it was a wiring fault. Now time to try parsing. thanks.

After a bit of research (probably not enough) and some testing of another device that connects to the controller i think that the string below is correct including the CRC.

01 02 01 EA E2 00 23 17 04

I am putting     \x01\x02\x01\xEA\xE2\x00\x23\x17\x04    into the Monitor Output String but i am not seeing a response. Is my string formatted incorrectly?

Thanks for the reply. This probably shows my naivety here. I was simply trying to send the example commands from the manual i attached via the monitor windows. Such as..

01 02 01 EA E5 00 01 0F D0 04

But to no avail. Being a complete novice I should probably educate myself in serial protocols, CRC etc.

Hi, i am trying to read and send some data via a new serial protocol. I have tried using a few samples elsewhere on the forum but i cant seem to prod the device as per the DAQ Factory serial guide.

I have so far got the comms setup and in the monitor i can send and see a TX entry but i don't get a response. Probably because the command i am sending isn't formatted correctly. More info on how it should be formatted is attached.

Any help would be appreciated.

extract.pdf

Hi, i actually found a good demo here. I seem to have got it working by following this guide. thank you.

Hi, I am really new to using MODBUS. 

I have managed to setup the comms. I can read and write some data from/toUntitled1.pdf a WEG VFD. Such as speed and voltage.

However to control the VFD it uses a Control Word. (PDF explanation attached) Can somebody help me display the Control Words bit status's in a table and create buttons to change individual bits.

Any help would be appreciated.

Untitled1.pdf