4 Step Ladder Instructions b) Jumping Sequence 1. The control power over the step is transferred to 2. The control power over the step is transferred to a certain step on top. the step in another sequence. OUT S0 OUT S1 S0 OUT S21 OUT S21 S41 OUT S42 S42 S41 S43 S43 c) Reset Sequence See the diagram in the right hand side. When the condition at S50 is true, S50 will be reset and the sequence will be completed at S0 this time. S21 RST S50 Complicated Single Sequence: Including simultaneous divergence, alternative divergence, simultaneous convergence and alternative convergence.
a) Structure of simultaneous divergence When the condition at the current step is true, the step can be transferred to many steps. See the diagrams below. When X0 = On, S20 will be simultaneously transferred to S21, S22, S23 and S24. Ladder diagram: SFC: S20 S X0 S20 S21 S22 S23 S24 DVP-PLC Application Manual 4-12 SET S21 SET S22 SET S23 SET S24