A simple on-delay timing instruction ... have helped ladder diagram programming to remain a flexible and viable tool for many PLC applications. Unfortunately, computers and microprocessors don't use ...

THE use of function blocks for programming of programmable logic controllers (PLCs) is gaining wider acceptance. Rather than the classic “contact and coil” representation of ladder diagram or relay ..

The programmable logic controller (PLC) is a microprocessor-based system that accepts input data from switches and sensors ... This programming language would use symbols encountered in conventional ...