I was earlier using 7.3.7 version on Fedora 14 linus to communicate with AB/Mitsu/Siemens PLCs. I recently upgraded to latest version to avoid bugs in earlier versions. So currently I am using 7.6.4 version. But I observed that my Siemens PLC is shown connected under STATUS tab but when I open Designer and check under SQL Tags Browser, my tags shows ? symbol before tag names which means it is not reading PLC tags actually.
I am using Siemens S7-315-2PN/DP PLC with firmware3.1/3.2
I have not yet tested with AB PLC. But I will check in a day or two and update the same.
I do not get any errors on system console regarding communication of siemens plc. I have attached system console log file. I have also attached some of screen shots for your reference of my project. The same project works without any errors on 7.3.7.
I guess I have not made any mistake in defining the tags. e.g. [Siemens]DB510,REAL0…
What scan class are these tags using?
Can you attach a screenshot of the diagnostics page for the device. This can be found in the Ignition gateway under Configure>OPC-UA>Devices. To the right of the device you will find a diagnostics link.