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The 1COUNT40kHz Counter Module
Hysteresis
Counter value
Comparison value + hysteresis
Comparison value
Comparison value – hysteresis
Switching output
active
Figure 13-12 Example 1: The Output Is Set to Be Active from the Comparison Value to Overflow
Counter value
Comparison value + hysteresis
Comparison value
Comparison value – hysteresis
Switching output
active
Figure 13-13 Example 2: The Output Is Set to Be Active from the Comparison Value to Underflow
13-12
Hysteresis is only significant in upward/downward count mode.
Hysteresis, which can be set from 0 to 255 allows you to prevent the switch-
ing output from changing with the direction signal around the comparison
value or the pulse duration from being restarted.
If the counter counter reaches the comparison value for the first time after
entry, the output is activated.
Here are five examples:
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
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