Festo Checkbox Compact CHB-C-C, Manual

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4. I/O module extensions of the Checkbox PLC
4-11
Festo P.BE-CB-COMP-EN en 0211a
4.3.3 Counter function
With CheckKon a counter function can be activated for the
Checkbox PLC and a target number can be specified for each
parts type. Depending on the setting in CheckKon, only good
parts in the nominal orientation or good parts in all learnt
orientations will be counted. The counter function can only be
activated if the special function “External sensor” is not used
(see chapter 4.3 table “Special functions”).
Counter status
The counting process will be interrupted when the Checkbox
stops. The current counter states remain saved. When the
Checkbox is started again, the counting processes are con-
tinued with the saved counter states.
Please note
The counting process will be discontinued if the Checkbox
is switched off (operating voltage off). The current counter
states will be deleted. When the Checkbox is switched on,
it will start a new counting cycle.
Remove, therefore, all good parts from the parts delivery
position when you switch off the Checkbox. In this way,
you will avoid incorrect parts counting when the Checkbox
is switched on again.
Counting process (standard Checkbox design)
If the set target number of a parts type is reached, all further
good parts of that parts type will be blown down at the deliv-
ery position for superfluous good parts until the small parts
conveyor is switched off. Bad parts will be further rejected at
the appropriate delivery position.
cFul When the last good part in a counting process reaches the
delivery position for good parts, output O/22 will be set from
LOW
>
HIGH via the connection “Controller” (“Target number
reached”). The current counting process is concluded. The
Checkbox PLC indicates “cFul.”