All PSoC Application Notes

AN2070: A Micro PLC for Process Control

A PLC or a Programmable Logic Controller in any process control, e.g. a petroleum refinery, an automobile manufacturing unit or a building complex is designed to carry out operations and annunciations in the working of the plant that could be the monitoring of pressure, temperature, Motor and Valve status, etc., and controlling of electrical and mechanical machines within a sequence of values of time, pressure, temperature, level etc. In reality PLC's could be quite complex and is usually built around 486 and Pentium based processors with plenty of Analog and Digital I/O's to control an entire series of operations. However, at times an application may desire the use of a PLC with very limited functions but the costing doesn't suit the budget. Thus arises the need of having a flexible and programmable MicroPLC within a very restricted budget.