Communcation between CJ1 and Eurotherm 2704

[Sasan 0]

I have a Eurotherm 2704 (temperature controller) and I need to communicate with CJ1 plc through 2wire RS485. I think that I have to use SCU41, but I do not khow the wire connection and setting of devices. Whould you help me? THANKS

[banker 2]

Hi Sasan Eurotherm controller can "talk" modbus. You can find all the wiring info on Eurotherms home page: http://www.eurotherm.co.uk/ For the Omron part (SCU41) you can find info on this site under downloads. Banker

[tashinz 9]

to spare you of searching through omron manuals. on scu41 port 2 is rs485 where pin 1 is SDA(-) and pin 2 is SDB(+). just wire these two pins with the same pins on eurotherm. i almost had one job with eurotherm but we decided to use omron e5cn.

[Sasan 0]

Hi Tashinaz; Thank you. Whould you tell me wich pin is "com" in scu41 ?

[PdL 71]

Have a look at this manual: W336-E1-08 CJ/CS Series V1 Serial communications units Operation Manual

[MiniH 0]

Sasan, Depending on the version of CJ you have Modbus ASCII/RTU maybe possible on the HOST Link port with the Serial Gateway Proticol. You then might be able to use a CJ1W-CIF11 or equivalent to communicate to the Eurotherm TC. Save some $$. I have not tried this particular combination,but, would be interested to know if someone has? MiniH