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Siemens SIMATIC ST-1500 - Synchronization at signal N; Periodic synchronization

Siemens SIMATIC ST-1500
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The basics of counting, measurement and position detection
2.2 Basics of counting, measuring and position input (TM Count, TM PosInput, Compact CPU)
Counting, measurement and position detection
40 Function Manual, 12/2017, A5E32009889-AG
2.2.7.2
Synchronization at signal N
You can trigger synchronization at signal N at the encoder input either directly or depending
on the status of a digital input.
Single synchronization
The figure below shows an example of single synchronization at signal N (not dependent on
a digital input):
After synchronization is enabled for counting in an upwards direction, the counter is
synchronized at the first signal N. After resetting and setting the control bit (Page 185)
EN_SYNC_UP once again, the counter can be synchronized again.

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