Version 1.0
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122
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SAV 876.17
9 APPENDIX
9.4.5
Errors in the environment or operating errors
Errors in the environment or operating errors
Appearance
Error cause
Measures for
Error localisation
error elimination
Comment
“System OK” display-
ed on the control de-
vice, but no reaction
to signal inputs
Connector on communication
interface faulty
Measure signal impulses on
communication
interface
Correct wiring, replace
connector strip
Or signal connection to the
external PLC faulty
Measure signal impulses on
communication
interface
Check signal cable,
check PLC output
Or impulse duration for
signal inputs too short
Measure signal impulses on
communication
interface
Increase impulse duration
externally
Min. impulse dura-
tion for detecting the
signal inputs 0.5 s.
“Clamped level XX”
displayed on the
control unit, but no
holding force
Magnet connected incorrectly
Check terminal assignment
as per terminal diagram
Correct terminal assignment
Or incorrect mains voltage
Check voltage indicated on
magnet housing/type plate
on control unit
Establish correct mains
power supply
Or soiling on slip ring body
Visual check
Clean slip ring bodies and
carbon brushes
Caution: disconnect
devices from power
supply before che-
cking or replacing
Or the device is being used
for the first time and has not
yet been configured for a
magnet
Set up the correct magnet-
ising/demagnetising curve
in the menu. If necessary,
request the values for the
magnet from service.
Or wire broken in magnet
coils
Measure winding resistan-
ces and compare to infor-
mation in the test record
Contact service
Return magnet
and controller if
necessary
No machine enable
Value “min. Hold. force lev.”
set incorrectly
Check set value in the menu
of the polarity reversal
controller (see instructions
for use)
Lower limit value or work
with higher holding force
level
Communication interface with
the control element faulty
Check plug connection
Re-establish plug
connection
Communication interface to
the machine controller faulty
(in NC operation)
Check plug connection
Re-establish plug
connection
Back-up fuse drops
out
Fuse protection too weak
Check mains fuse
Correct fuse protection as
per specified connected
values
Fuse protection too quick
Check mains fuse
Use medium-inertia fuse
