DonM Posted September 13, 2011 Report Share Posted September 13, 2011 Hello, I would just like to check if there are any problems configuring a V570 to communicate on 2 separate Modbus RTU networks using PLC com ports 1 & 2 both using RS485? On one network the PLC would be a master and on the other a slave. Thanks. Best regards, Don. Quote Link to comment Share on other sites More sharing options...
Emil Posted September 13, 2011 Report Share Posted September 13, 2011 No any problem! Standard situation. Quote Link to comment Share on other sites More sharing options...
MVP 2014 Simon Posted September 13, 2011 MVP 2014 Report Share Posted September 13, 2011 Hi Don, See the examples: C:\Program Files\Unitronics\Unitronics VisiLogic_C\Examples\Version 900\Project examples\Communications\MODBUS then look for V280_Modbus_port_to_port_test.vlp change the hwardware properties to V570 and download it. It sets one port as master and one also slave so you can do a loopback. Very handy when testing Modbus comms, so you can at least confirm if the PLC Modbus is working. Then you can plus in external masters/slaves. Quote Link to comment Share on other sites More sharing options...
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