klauricella (Customer) asked a question.
Connecting C-More to a Schneider M340 using Modbus TCP/IP
Is it possible to connect a C-More to a Schneider M340 using Modbus TCP/IP. I have an existing control system that I would like to have remote access and messaging. I do not have much experience with the Schneider side and haven't used Modbus in the last 10 years.
Thanks
Kevin
Looking at data sheet for the M340 it appears to have Modbus TCP capability. If yes, then you would be able to connect to a C-more using the Modicon Modbus TCP/IP driver. You would need a list of available Modbus addresses in the M340 for the C-more to access.
Hi Kevin,
This might help you out with the M340 Modbus Addresses.
http://www.plctalk.net/qanda/showthread.php?t=43264
Regards,
Garry
https://accautomation.ca/series/c-more-hmi-series-panel/
Yah, Let me make this easy for ya:
YES, it's possible. You CAN make a C-more rig talk schneider style modbus/tcp. There are a few caveats, however. The first is that whichever schneider PLC you are using, make sure that it's using static addressing. This is very particular with the m340; as well as the new m240/250/260s, in that it defaults to dynamic addressing. A TM221 still uses static addressing by default by comparison. The second part of it is for every word you are addressing from the C-More, the addressing gets a little funny. (ie, %mw62200:= modbus 462201) due to the fact that the driver provided for c-more software uses old modicon communication protocols as opposed to the newer schneider protocols (1 based versus 0 based). I figured this out after a long fight with it today. Tech support did their best, but the best results I got from trial and error and a fun little program called modbus doctor (kscada.com/modbusdoctor.html) which helped me see that the data was THERE just like it was supposed to be, the old c-more driver stack was just looking at the wrong locations.
Hang in there, and keep the faith bruddas.