IEC 61131

IEC 61131 is an IEC standard for programmable controllers. It was known as IEC 1131 before the change in numbering system by IEC. The parts of the IEC 61131 standard are prepared and maintained working group 7, programmable control systems, of subcommittee SC 65B of Technical Committee TC65 of the IEC.

Standard IEC 61131 is divided into several parts:

A further part is currently being worked on:

IEC 61499 Function Block

PLCopen has developed several standards and working groups.

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