So I created the project in the office, backed it up and restored on new machine onsite. Everything looks good until I tried a few function that write to the PLC and got this error "Error writing "XX" to tag ...... Bad_ReadOnly. Happen with client as well as in the designer tag browser. Probably missing something stupid simple.
Version is 8.1.37, the latest now.
Maybe dumb question, but is the tag set to read only?
No, not a bad question at all. This is only my 2nd project on Ignition so probably something stupid on my part. The first one was a tiny 3 screens Edge Panel. This one does have 2 clients.
The HMI tag is not set to read only. The Logix PLC tag is set to read and write. I don't see an option associated with client launch too set to read only but in the Designer I know you can set to Comm Off/Read Only/Read-Write and it's set to Read-Write.
I set up the gateway, looked at it then walked away to set up the client and that's when I realized that I got a problem so I'm not sure this same issue exist at the gateway machine itself. I intend to check that next week.
Is the tag in the PLC set for external access?
Yes, external access is allowed in Logix. This is a iFix to Ignition conversion so nothing in PLC has changed. Also, this worked just fine on the workbench.
Found it, tech support had me checking a few things and it's
Config > OPC > OPC Connections and make sure that the OPC UA Server that the tags are coming from is not set to Read Only.