Process control system

A process control system is disclosed. The system comprises a HMI unit, a plurality of controllers, and a plurality of I/O units. The HMI unit is used to compile a process logic associated with a plurality of process equipments. Each controller includes a processing module and a memory module. The memory module stores the process logic, a command interpreter, and a unified data logic engine program unit. Each processing module is used to execute the unified data logic engine program unit and command interpreter such that the process logic can be transmitted to the corresponding command interpreter from the unified data logic engine program unit. Afterwards, the I/O units transmit the interpreted process logic to the process equipments such that the process equipments can be controlled to proceed with a series of process steps corresponding to the process logic.