In order to provide with input interface for the designed self-adaptive control system to modify PID regulating parameters in real-time,An advance PID function module for FCS165 fieldbus control system has been developed,three operation modes,namely automatic control mode,tracking mode,and compulsory mode,being given by the said module.Under condition of three said modes,if the controlled values is exceeding limits,they can be confined from begining to end within a set range between upper and lower limits o...