Ways of communication between programmable logic controllers.
Control of continuous processes.
Program documentation.
Simulation of designed program results and debugging.
Error detection and handling during program run.
Real-time run of program, interrupt, using high speed counters.
Special PLC modules.
Literature
REDDY, Y. J. Industrial process automation systems. Boston, MA: Elsevier, 2014. ISBN 978-0-12-800939-0.