The most common industrial control system is based around a PLC based controller, usually of modular construction with dedicated modules for specific tasks, tailored PLC systems can be assembled to carry out complex and varied tasks.
Axis control modules are usually available to integrate motion control modules into PLC racks, providing control of servo systems from within the PLC Ladder diagram programming language.
Integrated safety functionality is available in medium and larger platforms to handle emergency stop, guarding and safety devices used on a machine.
25 Years of PLC based control systems
Rockwell Control Logix & Compact Logix GE Fanuc Allen Bradley PLC5, SLC500 Siemens S5 and S7 Omron Mitsubishi Scheider Bosch Rexroth IEC61131 based systems (CoDeSys)