inon Posted November 2, 2018 Report Share Posted November 2, 2018 Hi all I have connection problem with V350 PLC (slave) to Kepware OPC using modbus TCP/IP. some background : 1. the plc holding register is MI201 (the address we maintain is 400202, data type: short ). 2.all other values that was needed to create the tag was maintained as default values . 3. I have checked there is a ping from my machine to the plc . 4.when I running the QC in the OPC the tag quality is" BAD" and the value is "unavailable". what you supposed my next step should be to solve this issue and read the value ? Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted November 2, 2018 MVP 2021 Report Share Posted November 2, 2018 Post your program, or at least the Ethernet, Socket, & MODBUS configuration in the PLC. Quote Link to comment Share on other sites More sharing options...
inon Posted November 5, 2018 Author Report Share Posted November 5, 2018 Hi Flex, thank you for your help. It's look like i success to overcome the problem. Best regards Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted November 6, 2018 MVP 2021 Report Share Posted November 6, 2018 Glad you solved your problem. If you get a chance try to describe your problem and solution so that others might benefit. Quote Link to comment Share on other sites More sharing options...
Rafe Posted September 5, 2019 Report Share Posted September 5, 2019 I am having the same issue, How did you resolve the issue Quote Link to comment Share on other sites More sharing options...
Rafe Posted September 5, 2019 Report Share Posted September 5, 2019 I got it to work using the following settings Quote Link to comment Share on other sites More sharing options...
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