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Starting up the device - Configuration
1
2
3
1
Switch-on signal
2
Switch-off signal
3
Output
Fig. 8.6:
Example 2: Start-up delay > 0 and switch-on time > 0
In example 2, the activation duration of the output is only dependent on the selected switch-on time; the
switch-off signal has no effect.
1
2
3
1
Switch-on signal
2
Switch-off signal
3
Output
Fig. 8.7:
Example 3: Start-up delay > 0 Switch-off signal prior to lapsing of the start-up delay
If the output is again deactivated via the switch-off signal before the start-up delay lapses, only a brief pulse
appears at the output following the start-up delay.
Comparison functionality
If, for example, the switching output is to be activated after four invalid read results, the comparative value
is set to 4 and the switch-on function is configured to "invalid read result".
The comparison mode parameter can be used to define whether the switching output is activated only once
in the case that the event counter and comparative value fulfill the "parity" condition, or if it is activated mul-
tiple times, on each successive event after the "parity" condition is met.
The event counter can always be reset with the I/O data in the I/O status and control module; furthermore,
the reset mode parameter enables automatic resetting upon reaching the comparative value. Automatic re-
setting upon reaching the comparative value always results in the switching output being switched once in-
dependent of the comparison mode parameter.
Leuze electronic GmbH + Co. KG
4
5
4
5
4
4
BCL 248i
Start-up delay
Switch-on time
Start-up delay
87
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