In this paper, we review aspects relevant to
industrial standards related to PLC programming: IEC
61131, IEC 61499 and a work about safety developed by the
PLCOpen organization based on IEC 61508. We propose to
use these standards in PLC learning to fix a common knowhow
that allows one to reduce the gap between industry and
education, and between different professionals. We show the
application scope of these standards by analyzing the IEC
61131 limits. The IEC 61499 can be introduced in distributed
control systems and in complex centralized systems with
multiple operating modes. In critical applications, like safety
functions, where functional safety is required, the IEC 61508
is a reference model
