Transition Condition - Siemens SIMATIC S7-200 Getting Started

Sequencer

5.4 Transition condition

5.4 Transition condition
What is a transition condition?
● Each step is started (activated) by a condition. The condition is usually derived from the
states of the machine. These can include actuated limit switches, operator keys,
temperatures reached or timers.
● An active preceding step is almost always part of the condition.
● If a new step flag is set, the step flag of the preceding step is reset.
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Getting Started - Advanced
Training Documents, 09/2007, A5E01469795B