Posted 28 Sep 2010 Hi Can i use optional rs-485 CM module for data exchange between two s7-1200s. Thanks Share this post Link to post Share on other sites
Posted 12 Oct 2010 Yes, using Modbus protocol and included libraries. Share this post Link to post Share on other sites
Posted 15 Oct 2010 Ethernet is built in to the 1200, so why would you want to buy these extra modules and do this?? Share this post Link to post Share on other sites