Does anyone know the best way to check the error codes on a 90-30 I-NET PLC? What software/hardware do I need? I'm told there is no ladder logic so how are errors examined? Any help out there?
Start here.
If you need more detailed help, please include a little more detail.
If there is no ladder logic, it may be 'remote I/O'.
In any case if there is a 90-30 controller of some sort with Ethernet, you will most likely need Proficy Machine Edition software and an Ethernet cable to look at the "Fault Tables" within the controller.
Search these terms on the above linked site.