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Latch-retrigger function
This function enables the event-driven evaluation of the counter status.
The actual internal counter status of the electronic module is retained when there is an edge at the
digital input. The check-back interface/process input data supplies the ”frozen” value. The internal
counter status is retriggered, i.e. the load value is loaded and counting is resumed from the load
value.
In order to execute this function the counting mode must be released with the software gate.
Bit STS_DI (Status DI) indicates the status of the Latch and Retrigger signal. The edge signal cannot
be inverted.
The load value with which the operating mode starts is displayed before the first edge after the soft-
ware release is set.
A direct loading of the counter does not change the counter status indicated.
Software release
‚Digital input
ƒInternal counter status
„Displayed counter status
…Start, manual
†Latch
‡Stop
NOTE
Ensure that input DI is not inverted otherwise this will generate an error/diagnostics mes-
sage.
Fig. 267: Latch-retrigger-function with a parameterized abbort of the count operation
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