Posted 19 Sep 2019 Hi, I want to set communication between ABB CI853 Modbus Master module and Mitsubishi RJ71C24 module. I tried with predefined protocol (you need to set slave address, but ABB is master), also with non-procedural (with G_Output function block), but without success. I tried connect ABB with QJ71MB91, and it worked because you can then set slave address and a station number, and this can't be set with RJ71C24??? If someone had a similar problem, I'll be grateful for sharing a solution. Best regards Share this post Link to post Share on other sites
Posted 20 Sep 2019 Does ABB have a modbus TCP master ? Modbus TCP Slave is standard on the RCPU available. Share this post Link to post Share on other sites
Posted 27 Sep 2019 (edited) On 9/20/2019 at 8:27 AM, Gambit said: Does ABB have a modbus TCP master ? Modbus TCP Slave is standard on the RCPU available. Yes, via ABB CI867 module (which I don't have it), but I have existing CI853 modbus module and that's why I need to have modbus rtu communication. Edited 27 Sep 2019 by Luka0204 Share this post Link to post Share on other sites
Posted 27 Sep 2019 Ok the QJ71MB91 is a modbus module the RJ71C24 is just serial communication. So you can add a System Q extension backplane for the iQ-R and add this module. But i would be easier just to add a GOT and use this as a modbus slave and also comm with the iQ-R and let the data copy the data between them. Share this post Link to post Share on other sites
