USING AND DIVERGENCE TOWARD 2 SFC BRANCHES (DIV AND 2)
Divergence to AND is used to represent and control simultaneous operating phases. This method of linking operating phases performs the inverse function to that of AND convergence.
An operating phase (B01) can be followed by two operating phases which are executed at the same time in relation, for example, to two control devices on the same system. An SFC function called AND DIVERGENCE TOWARD 2 SFC BRANCHES (or DIV AND 2) is used to represent this operating mode. The function is wired to two step functions, each of which symbolises one of the simultaneous operating phases.
When the transition control input on block B01 is ON, the token, if it is present in step B01, migrates from this step, crosses transition B01, splits into two tokens, which, when they fall into steps B03 and B04, activate the two parallel operating phases.