Steveo Posted March 4, 2017 Report Share Posted March 4, 2017 Hi All - I have two V570's configured with Modbus RTU (rs485) for COM Port #2 on both units. I used the Modbus master/slave examples and the read/write functions work fine. My problem is that I when I use the Check Network Status for the slave under Communication and OS it times out and returns a red, fail status. Everything I have read gives me the impression I should be able to use the master as a bridge to the slave unit for downloading projects. Is this possible over Modbus RTU? If so, what am I missing? Thank you for any help. Here is my Setup: PC directly connected to USB port on Master v570. Master v570 Port 2 connected to Slave v570 Port 2 with 6 wire cable. Units are sitting on desk 2ft apart for testing. Jumpers are set to rs485 with termination on both units' Port 2. Attached are the master/slave projects: Modbus485 Master.vlp Modbus485 Slave.vlp Quote Link to comment Share on other sites More sharing options...
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