Technical Appendix; Malfunctioning; General Cause Of Faults - Festo Checkbox Compact CHB-C-C Manual

A. Technical appendix
A.1

Malfunctioning

A.1.1 General cause of faults
Problem
Device does not function, both
illuminous buttons flash.
Good test parts are sorted out
as bad parts
Bad test parts are accepted by
the device as good parts
– Display cFul
– Good parts in all orientations
are blown back into the small
parts conveyor
– Response timing point/
duration of the Checkbox
is not correct
– Test part deviation is
displayed for an unusually
long time
Festo P.BE-CB-COMP-EN en 0211a
Cause
Ambient, setting,
data or hardware fault
– Tolerance set too low
– Incorrect parts type selected
via external type preselection
at connection PLC
– Tolerance set too high
– Deviations for the Checkbox
not recognized
The preselected counter status
is reached and is not reset by
the external controller
Checkbox runs in diagnostic
mode (setting via CheckKon or
CheckOpti)
Remedy
1. Identify fault coding in
chapter A.1.2
2. Eliminate fault
3. Quit with START/STOP button
– Increase tolerance and
repeat teach procedure with
more sample parts
– Select (correct) parts type
via external type preselection
– Reduce tolerance
– With CheckOpti: Optimize the
teach data
– Check connection to
controller
– Check PLC program in the
controller
– With CheckKon/CheckOpti:
Switch from diagnostic mode
to operating mode
A-3