Siemens SIMATIC ET 200S Operating Instructions Manual page 90

1Count24V/100kHz
2.8 Position Detection
Canceling- and Interrupting-Type Gate Function
When assigning the gate function, you can specify whether the internal gate is to cancel or
interrupt counting. When counting is canceled, after the gate is closed and restarted,
counting starts again from the beginning. When counting is interrupted, after the gate is
closed and restarted, counting continues from the previous value.
The diagrams below indicate how the interrupting and canceling gate functions work:
Figure 2-35
Figure 2-36
Gate Control
Gate control by means of the SW gate only
When the gate is opened, one of the following occurs, depending on the parameter
assignment:
• Counting continues from the current count
• Counting starts from the load value
If the SW gate is opened in isochrone mode in bus cycle "n" by setting the SW_GATE control
bit, counting starts before or after T
90
Position Detection, Up, Interrupting Gate Function
Position Detection, Down, Interrupting Gate Function
or
, depending on the position of T
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Operating Instructions, 02/2007, A5E00124867-05
.
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Technological Functions