Basic Process Control System (BPCS) is a system which handles process control and monitoring for the facility. It will take inputs from sensor and process instruments and provide output to field equipment based on control functions, in accordance with approved design control strategy. Typically, Basic Process Control System (BPCS) performs the following functions:

• Controls the process within pre-set operating conditions
• Optimises plant operation to maintain product quality
• Attempts to keep all process variables within their designed safety limits / safe operating envelope
• Provides operator interface for monitoring and control via operator console / station 

(Human Machine Interface)

• Provides alarm / event logging and trending facilities 
• Generates production data reports

Basic Process Control System (BPCS) is also considered as one of the ‘process safety layers’ preceding Safety Instrumented System (SIS) within a facility.

1. Be aware of the principles of a ‘Safe Operating Envelope’
2. Be familiar with the general system construct, operational basics, and physical field equipment of a ‘Basic Process Control System (BPCS)’
3. Know the basic philosophy of control loops, independent layers of protection and ‘Safety Instrumented Systems’ (SIS) functionality (Including overfill protection and ROSOV)
4. Know the essential requirements for remote communication between Field Operators and Control Room Operators and information acquisition
5. Demonstrate physical recognition and functional requirement of the control interface systems, instrumented devices, and field equipment