I have a customer running Ignition v7.9.10 that handshakes some data with a 1769-L33ERM v24.13 PLC. They are having a problem where they write some data to an Add-On-Defined (AOI) tag in the PLC but the PLC gets the wrong data. The customer then changes the PLC tag name from tag1 to tag2, updates the Ignition end of things, and the problem goes away for a few months. A few months later the same problem starts appearing again.
My theory is the Ignition Gateway is getting confused at some random point of time… is there any evidence to support this theory? I’d like to be able to tell the customer they need to upgrade to 7.9.18 and not get this problem anymore.
The PLC data type is 11 BOOLEANS followed by a DINT. Ignition reads/writes to 6 of the BOOLEANS.
Sidenote: One problem I noticed in 7.9.10 is if I have an array of 128 BOOLEANS in the PLC Ignition 7.9.10 reads those tags as 4 DINTS. This again makes me think the older version of Ignition had some conversion issues when reading/writing to PLC tags.
Thanks for any insight.