Technical Appendix; Operating Faults; Eliminating General Faults - Festo Checkbox Compact CHB-C Series Manual

A. Technical appendix
A.1

Operating faults

A.1.1 Eliminating general faults
Problem
Device does not function, both
illuminous buttons flash.
Good parts are sorted as bad
parts.
Bad test parts are accepted as
good parts by the device.
Display cFul
Good parts are blown back
into the small parts conveyor
in all orientations.
Response time point/dur
ation of the Checkbox is not
correct.
Test part deviation is shown
for an unusually long time.
Tab. A/1: Faults and remedies
Festo P.BE−CB−COMP−en en 0503c
Cause
Ambient, setting, data or
hardware fault
Tolerance set too low
Incorrect parts type selected
by external type preselection
at the PLC connection.
Tolerance is set too high.
Deviations are not recog
nized by the Checkbox.
The preselected counter status
is reached and is not reset by
the external controller.
Checkbox runs in the diagnostic
mode.
Remedy
1. Identify fault coding in
appendix A.1.2.
2. Eliminate fault.
3. Quit with START/STOP
button.
Increase tolerance and
repeat Teach procedure with
more sample parts.
Select the (correct) parts
type with external type
preselect.
Reduce tolerance.
With CheckOpti: Optimize the
Teach data.
Check connection to
controller.
Check PLC program in the
controller.
With CheckKon: switch from
the diagnostic mode to the
operating mode, or
Conclude CheckKon/
CheckOpti.
A−3