Switching At Comparison Values With Counter Value As Reference - Siemens SIMATIC ST-1500 Function Manual

The basics of counting, measurement and position detection
2.2 Basics of counting, measuring and position input (TM Count, TM PosInput, Compact CPU)
2.2.8.2

Switching at comparison values with counter value as reference

The comparison values are compared with the current counter value. If the counter value
meets the assigned comparison condition and the technological function of the associated
digital output is enabled, the digital output is set. If you assign "Between comparison value 0
and 1" for digital output DQ1, both comparison values affect DQ1.
You can make switching for a digital output dependent on one of the following comparison
events:
Setting between comparison value and high counting limit
The digital output is set to 1 if:
Comparison value <= counter value <= high counting limit
The comparison event is independent of the count direction.
Setting between comparison value and low limit
The digital output is set to 1 if:
Low counting limit <= counter value <= comparison value
The comparison event is independent of the count direction.
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Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG