Errors In The Environment Or Operating Errors - Sav 876.17 Operating Instructions Manual

SAV 876.17 9 APPENDIX
9.4.5

Errors in the environment or operating errors

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