Divide-By-N Counting, Non-Recycle Mode - Siemens SIMATIC TI505 User Manual

Divide-by-N
Counting,
Non-Recycle
Mode
High Speed Counter Encoder Module User Manual
In divide-by-N non-recycle mode, a preset value is loaded into the counter.
The counter counts up or down on each input pulse. In the count-up
direction, when the counter overflows, it generates a carry signal. In the
count-down direction, when the count underflows, it generates a borrow
signal. When a carry or borrow signal occurs, the counter stops.
The counter restarts when you reload the preset value into the counter or
you reset the counter registers by one of the following conditions:
An external INDEX pulse when WY21.07, or WY27.07, or both are set.
A PLC counter reset (WY19.02 or WY19.06).
Setting the program flag (WY20.01).
Loading presets loads the new preset value after the next carry or borrow
pulse occurs.
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