The PCS-9139 diesel generator control system incorporates a diesel generator control system, an excitation control system, a generator synchronization closing control system and a generator protection system. The PCS-9139 mainly consists of an automation system and a circuit breaker part. The automation system is used to control the start-up and shut-down of a diesel generator as well as its auxiliary devices. This can be realized by a high-powered PLC (programmable logic controller), which makes the system reliable and easy to operate.