Software Synchronization - Siemens SIMATIC S5 Equipment Manual

Matching Module for Incremental Encoders
Otherwise, the zero marking pulse of the encoder would be effective twice.
Otherwise, the counter is synchronized as often as the number of pulses contained in the zero
marking pulse.
coincide, the synchronization pulse is generated and the counter is synchronized.
– During synchronization the synchronization bit of the respective channel is set and the related
synchronization LED on the front plate goes off.

Software Synchronization

3.3.6
The software synchronization is called
(e.g., by a standard function block with the
command SS).
block ( 1P 241) contents.
The 1P 241 sets the synchronization bit
The 1P 241 dims the synchronization LED
The 1P 241 provides the NV value as the actual value
The 1P 241 causes an interru t if the NV value is greater
than an entered set value wit interrupt identifier or
always when the NV interrupts are enabled.
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The data block DB (IP 241 )
is set with an NV value
(or left at zero).
1