This chapter reviews part 5 of the IEC 1131 standard, which focuses solely on PLC communications. In this chapter, it reviews the main scope of the IEC 1131-5 standard, the communications model, the PLC functional model, accessing PLC status information, communications function blocks, mapping of communications function blocks on to MMS.

Inspec keywords: industrial control; IEC standards; programmable controllers

Other keywords: communications function blocks; IEC 1131-5 standard; programming industrial control systems; communications model; MMS; IEC 1131-3; PLC status information

Subjects: Control in industrial production systems