- Published in issue 11/1998 on page 18
Versatile control system PLC87(A) part 2:
command list (CL) programming
The PLC87(A) is programmed using Simatic compatible command lists (CLs). A CL consists of a sequence of logic combinations and/or instructions for the PLC to execute. In this second and last instalment we look at the way command lists are written, and also explain the operation of some of the more important instructions.