I’m having trouble writing to a tag from my project to a Click PLC. There’s no errors that show up in Ignition designer and when I do
result = system.tag.writeBlocking(['[default]MOD1-MOD3/Open_Command'], ) print result
the result is
[Good], but its not actually writing to the tag (as this particular tag triggers an office door and it is not opening when this is written to).
I am able to use Click Software to see the ladder logic and write to the tag that way and I get the expected results. I am also able to capture packets that are sent to it that way. I wanted to compare what is sent from the Click Software to the PLC versus what the Gateway is sending. But I cannot seem to capture anything from the gateway going to the PLC in WireShark (with the filter
Is this something I won’t be able to capture? I started thinking maybe its on purpose and I won’t ever be able to catch them due to some security measures, but I also thought maybe this is the reason why none of my tag writes are doing anything.
Should I be able to capture packets from the gateway to the PLC if I use OPC Quick Client from the gateway to write a value to a tag? We are all on the same network.