Re: [foxboro] I need a System Monitor Messages Decoder Ring
- From: "Johnson, David" <David.Johnson@xxxxxxxxxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Wed, 7 Apr 2010 09:54:02 -0500
Hey Ron,
I believe you nailed it! I think I am trying to read a coil that is out of
range with the transaction file, although there is not a block specifically
looking at that address. I am going to re-size the transaction file and will
let you know.
Thanks,
David
BTW, I would still be interested in learning to decode these type messages
without bothering the list. I really don't mind reading the manual (if I can
determine which manual, and the information in it is correct).
Pertinent information left below....
2010-04-05 06:37:37 C2CP03 Process = C2PP16 -39 1
HIGH MB P1 200 ALERT 01 01 Exception Code
OK, what does this mean, why am I gettting this, how do I fix it?
I would look into it being a Modbus message from the plc. Specifically an
exception code. (see http://www.modbustools.com/PI_MBUS_300.pdf) Perhaps an
exception code type 01 01 ( modbus read of coils{first 01}, illegal function
{second 01}) Are you trying to do a coil read and the device does not support
coils or possible the coil requested is out of range of the coils in the device?
I would suspect the "MB" means modbus and "P1" is port 1 "200" is block ecbtype
generating error of type "alert" ie...non critical and in CP "C2PP16".
I would look into sniffing the rs485 comms to see just what is being
transferred and what errors are being sent. I do this a lot on TCP/IP but sure
its possible on RS485.
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