Transient sequence / unstable step / virtual triggering
As described in Sequence rules , triggering a transition does not take any time. As a consequence of this, multiple consecutive steps can be activated at the same point in time one after the other. This sequence is called transient (continuous).
The intermediate steps in the sequence chain are referred to as unstable. The continuously effective actions connected to them are not displayed in the simulation. The allocations in the stored effective actions are carried out. Triggering the intermediate steps and their associated transitions is called virtual triggering (see example: Grafcet/Grafcet06.ct).
Related Topics