OPC has been a standard for a long time when reading from a PLC I was wondering what others thought of the newer OPC-UA specification? Is it a natural progression or will the indus …

I'm already aware of OPC for pulling data from a PLC, but I wanted to know what other alternatives existed that didn't require an OPC server in the middle. Assume we're trying to …

I'm sure this must be done quite a bit: Have a customer upgrading a PLC-5 to a CLX. They want to continue to run the PLC-5 in the process, so it uses existing inputs to control ou …