PLC based ignition system

A PLC based ignition system which controls the ignition of oil and gas fired appliances and provides levels of safety, reliability and stability, is developed. The brain of the system is a programmable logic controller (PLC). The control module provides multilevel component fault detection and tolerance in critical areas such as in flame sensing and valve control circuits. The control module is designed for reliable operation far beyond normal appliances life. The program minimizes shutdowns by providing recycling under certain conditions to establish normal operation before checking out. A timer provides precise timing for ignition and flame failure. An online timer and remote flame sensor are the main advantages of the system. The facility of input/output force on, force off, monitoring the inputs and outputs are also advantages. The facilities of input/output are also provided. Finally this system is factory programmable to provide different warm up times for ignitor systems.