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Load value direct/in preparation
A load value can be assigned to the counter. This value can either be set via the connected control-
ler or via the BL20-DTM in PACTware. The type of setting (direct/optional) is set via a bit in the con-
troller:
1 The direct load causes the counter to accept the load value directly as the new counter value.
2 The load value can also be loaded in preparation. In this case, the load value is accepted as the new
counter value in response to any of the following events:
– Lower or upper count limit is reached when no main count direction has been configured.
– Reaching the upper count limit with the main count direction set to up counting.
– Reaching the lower count limit with the main count direction set to down counting.
Pulse duration on reaching the reference value
The pulse duration starts from when the digital output is set and can be specified in order to adapt
to the actuators used. It specifies how long the output is to be set. The pulse duration can be set in
2 ms increments to between 2 and 510 ms.
If the pulse duration = 0, the output is set for as long as the comparison condition is fulfilled.
Fig. 271: Changing the counter status on counter signal and direction signal
NOTE
No pulse is generated if the counter value goes above the counter value, e.g. jumps from
the upper limit to the lower limit when counting up.
signal A
(counter signal)
signal B
(direction)
counter pulses
up counting
counter pulses
down counting
up counting
down counting
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