A testing system for, and method of, simulating signal flow through a logic block pattern of a real time process control system. The system includes: (1) a memory that contains a data base of input data associated with simulated sensors and a rule base containing control rules and ...http://www.google.com.au/patents/US5818736?utm_source=gb-gplus-sharePatent US5818736 - System and method for simulating signal flow through a logic block pattern of a real time process control system 
