Working With Memory Bits - Siemens SIMATIC S7-200 Getting Started

5.7

Working with memory bits

● A separate memory bit (step flag) is assigned to each step. This is "1" if the step is active.
● For the sake of clarity, only one step in a sequencer should be active at any time. This
means only one step flag should be "1".
● If the task is more complex, it is best to use an additonal sequencer.
● If two or more processes must be controlled simultaneously and independently, separate
sequencers are used. See the following diagram.
Getting Started - Advanced
Training Documents, 09/2007, A5E01469795B
Sequencer
5.7 Working with memory bits
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