I have two groups of OPC tags coming from two identical PLC’s. The first set of tags read fine. I copied and pasted the second set and changed their addresses to line them up with the second PLC but they all sit there with the green question marks and values of ‘null’.
If I browse in a different register to a new tag it connects OK, say N10:10, or N110:7… but it seems to not want to read any integer from N7, i.e. N7:1 or N7:100 will not read!!
Have done a gateway restart, has not cured it.
I am using 7.4.1
How do I solve this?