[mitchok]

Thanks for the help. Have managed to get that part working now. It seems I was trying to access a non-existant register !!!!!

[mitchok]

Thanks for the comments. I have tried communicating with a different unit and have had no trouble so I think I am either using the wrong address or the wrong data type

In my mind I have a vague memory that in the event of the slave not understanding the request or being unable to comply, it will repeat the request message back! Did I make this up or does this have some element of truth in it?

As you may guess, I am pretty new to this and trying to implement a metering solution on a very tight budget!

[mitchok]

See below

Thanks
Darren

2015-06-30 12:57:47 Communication session with Device 50 “CH#1”, type: KpModbus, call number: 192.168.5.19
Request element group
Send (12): 00 00 00 00 00 06 00 04 0A FF 00 01
Receive (7/7): 00 00 00 00 00 06 00
Receive (5/5): 04 0A FF 00 01
Incorrect PDU length!
Request element group
Send (12): 00 00 00 00 00 06 00 04 0A FF 00 01
Receive (7/7): 00 00 00 00 00 06 00
Receive (5/5): 04 0A FF 00 01
Incorrect PDU length!
Request element group
Send (12): 00 00 00 00 00 06 00 04 0A FF 00 01
Receive (7/7): 00 00 00 00 00 06 00
Receive (5/5): 04 0A FF 00 01
Incorrect PDU length!

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