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2 Modbus RTU Networks

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  • MVP 2014

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.

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