ISPSoft User Manual Divergence of sequence selection A divergence of sequence selection is shown below. The characteristic of a divergence of sequence selection is that the divergent steps have their own transitions. When one transition is true, the step following the transition becomes active, and the other transitions are not evaluated. Consequently, if there are divergent paths, only one path is taken at a time. Besides, the transitions are evaluated from left to right. If several transitions are true simultaneously, only the step following the leftmost transition will be activated. When Tran2 is true, STEP_0 becomes inactive, and STEP_2 becomes active.
Tran1 is not evaluated, and STEP_1 remains inactive. 14.2.4 Simultaneous Convergence and Convergence of Sequence Selection The divergent paths in a sequential function chart must be converged. There are two types of convergences. One is a simultaneous convergence, and the other is a convergence of sequence selection. Simultaneous convergence characteristic of a simultaneous convergence is that the convergent steps are connected to the same A simultaneous convergence is shown below. The convergent steps are connected by a double line. The transition. The transition will not be evaluated until the convergent steps preceding the transition are activated. 14-10