In a servo positioning system, reliable motion control requires more than simply driving a motor. The system must also be able to detect over-travel conditions, stop motion before mechanical damage occurs, and provide a safe method for clearing alarms after faults are resolved.
This guide demonstrates how to upgrade a PLC pulse-controlled servo system by adding overtravel protection and alarm reset functionality using three interposing relays. The result is a safer and more robust servo position control system suitable for industrial applications.



