Introduction

With parallel branches, switching a single transition leads to a parallel activation of more than one (maximum 32) step (branches). Execution is from left to right. After this common activation, the individual branches are processed independently from one another.

All parallel branches are grouped using a parallel joint according to IEC 61131-1. The transition following a parallel joint is evaluated when all the immediately preceding steps of the parallel joint have been set.

Combining a parallel branch with an alternative joint is only possible in Multi-Token operation.

Example of a Parallel Sequence

Example of a Parallel Sequence

Properties of a Parallel Sequence

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