n Output switches when counter value £ comparison value
–
The output remains set as long as the counter value is lower
or equal comparison value.
n Output set at comparison value (pulse at comparison value)
– When the counter reaches the comparison value the output is
set for the parametrized pulse duration.
– If the pulse duration = 0, the output is set until the comparison
condition is not longer fulfilled. When you've set a main
counting direction the output is only set at reaching the com-
parison value from the main counting direction.
n Pulse duration
– The pulse duration defines how long the output is to be set. It
can be pre-set in steps of 2.048ms between 0 and 522.24ms.
– The pulse duration starts with the setting of the according dig-
ital output.
– The inaccuracy of the pulse duration is less than 2.048ms.
– There is no past triggering of the pulse duration when the com-
parison value has been left and reached again during pulse
output.
n The hysteresis
serves the avoidance of many toggle processes of
the output and the interrupt, if the counter value is in the range of
the comparison value.
n For the hysteresis you may set a range of 0 to 255.
n The settings 0 and 1 deactivate the hysteresis.
n The hysteresis influences zero run, comparison, over- and under-
flow.
n An activated hysteresis remains active after a change. The new
hysteresis range is activated with the next hysteresis event.
The following pictures illustrate the output behavior for hysteresis 0
and hysteresis 3 for the according conditions:
Hysteresis
Effect at counter value
³
comparison value
VIPA System 300SDeployment I/O periphery
Counter - Additional functions
HB140 | CPU | 314-6CF03 | GB | 16-43 168
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