Different programmable logic controllers (PLCs) handle PID control loops in different ways. Some loops need to be set manually, while others can use an autotune process embedded in the PLC's software.

As controls engineers delve into this field, one of their initial encounters with a control system is often with the PID controller, and this open source project delivers two of these general ...

Drives can increasingly take on some simple PLC functions, but for more complex automation there’s no substitute for a dedicated PLC, argues Carl Eely, ABB’s product manager for industrial automation.