USING OR CONVERGENCE FROM 2 SFC BRANCHES (CONV OR 2)
OR Convergence is used to link an identical operating phase after one or other operating phases (simultaneous or not). This method of linking operating phases performs the inverse function to that of OR divergence (DIV OR 2).
Two operating phases, which may or may not be simultaneous (steps B01 and/or B02) are followed by a single operating phase which can only be initialised after the end of one of the two previous phases (as soon as transition B01 or B02 is controlled to ON). An SFC function called OR CONVERGENCE FROM 2 SFC BRANCHES (or CONV OR 2) is used to represent this operating mode. The function is wired to the two upstream transitions which each control the end of an operating phase (step B01, step B02) and to a downstream step (B03) which symbolises the unique phase which will be linked after one and/or the other of the two previous operating phases. The first control input triggering a transition when the activation token is present in the associated step causes the token to migrate towards the upstream step (B03) which symbolises the activation of operating phase 3.
First example: Transition 1 is controlled closed during operating phase 1:
Second example: Transition 1 and transition 2 are controlled simultaneously closed when operating phases 1 and 2 are being activated simultaneously: