petehannon007
Member
Has anyone ever seen where you have a tag reading from the plc in scada. In this instance it's just a PEC, I set it up on one scada terminal and it works fine.
When I set up the exact same tag on another terminal - it's not reading it. To test - I set up excel to read the tag - via the same DDE link, and excel sees the PEC change state ie 0 to 1 and vice versa.
I tried deleting the tag in scada tag dictionary and starting again, I tried adding a new DDE topic name and adding the tag through that link, but still will not work for this tag
Head scratching
When I set up the exact same tag on another terminal - it's not reading it. To test - I set up excel to read the tag - via the same DDE link, and excel sees the PEC change state ie 0 to 1 and vice versa.
I tried deleting the tag in scada tag dictionary and starting again, I tried adding a new DDE topic name and adding the tag through that link, but still will not work for this tag
Head scratching