Festo Checkbox Compact CHB-C Series Manual page 80

4. I/O module extensions of the CHB−C−P/..X
CFul
4−16
If the set nominal number of parts types is reached, all
further good parts of the parts type up to the moment when
the small parts conveyor is switched off, will be returned to
the conveyor at the actuator position for superfluous good
parts. Bad parts will be output further at the relevant posi
tion.
When the last good part of a counting procedure reaches the
output position for good parts, the output O/22 on the con
nection PLC will be set from von LOW>to HIGH (Nominal
number reached"). The current counter status is concluded.
The CHB−C−P/..X shows cFul".
All subsequent good parts will be returned to the small parts
conveyor. When the time preset with CheckKon has expired,
the small parts conveyor will be switched off.
In order to start a new counting procedure, the CHB−C−P/..X
requires the signal Start new cycle" from the higher−order
controller. In order that the counting cycle can be started, the
pulse LOW>HIGH>LOW must be applied at input I/18.
During the pulse duration t
The new counting cycle starts with the falling edge at I/18
(see following table).
Pin Signal level
I/18 LOW>HIGH>LOW
O/22 HIGH
LOW
Tab. 4/13: Signal sequence for controlling the counting
procedure
good parts will still be returned.
sc
Meaning
Starts new counting cycle
Preselected counter status
reached
Preselected counter status not
yet reached
Festo P.BE−CB−COMP−en en 0503c