Tags get created as Read-Only?

[mnegre]

I'm trying to use DeviceBridge to interface between WebIQ and a Rockwell PLC. I can read PLC tags with no issues in my WebIQ project but when I try to write to the PLC tags using a widget nothing happens. I have noticed inside the Data Layer that all the tags I add from my PLC using DeviceBridge show up in the Data Layer as "read-only". I have enabled the write back settings inside DeviceBridge and also inside the JSON Collector.

Is there any way to change the read-only status of the tags? Or is the issue something else I'm overlooking?

[HmiGuide]

Hello, ys

I do neither know rockwell nor device brigde handling, but when we use the Plc Engineering (CoDeSys) you have to define the access type of the variables (read, write or readwrite). Therefore I would expect that you have such an option in the Rockwell PLC too. Maybe even in DeviceBridge.

[Sgilk · Accepted solution]

This is the correct current function of Device Bridge. You cannot write directly to the Datalayer tags created for the write back function. You can only write out to the PLC from within the Device Bridge collector logic. I’ve requested that this process is changed to allow direct Datalayer write to the write back tags but haven’t received a timeline on this functionality.