Micro PLC system - Hands-on programming (part 1):

Last month we described a low-cost Programmable Logic Controller system, the Micro PLC. This system uses an instruction set which is largely similar to that of the wellknown SAlA PCs from Landls & Gyr. The short course we start this month begins with a general description of a typical industrial PLC. Next, we leave the hardware altogether, and concentrate on software only.