1. The sequence control, operation control and test operation to the main/auxiliary engine, valve, damper are realized. 

2. The large auxiliaries and its related cooling system, lubricating system and sealing system are interlocked and controlled. 

3. In the case of fault tripping of local equipment, the standby equipment are interlocked and started. 

4. The protection to the state alarming, linkage and single unit of auxiliary machine is realized. 

5. The design of the thermal protection system shall have measures to prevent misoperation and refusing to act, and in case of interruption or recovery of power supply, the false action instruction will not be given.