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8 007 487/ 10-10-99 Technical Description • LGT © SICK AG • Safety Systems • Germany • All rights reserved
6.3 Seven-segment dis-
play in control unit
The two-digit seven-segment dis-
play (Fig. 25) provides information
on the status, faults, alignment,
number of blanked beams etc.
Error messages are displayed in
blinking mode.
The following information is im-
portant for fault diagnosis puposes:
After the fault has been rectified, the
control unit must be switched off and
on again. When the error has been
rectified, the control unit must be
switched off and then on again or the
reset jumper must be disconnected
and then reconnected. If contrary fault
messages are displayed on the seven-
segment display, check the connection
system. If the fault still cannot be recti-
fied, submit the unit for repair or con-
tact the SICK representative.
Fault
Corrective measure
10
11
12
13
14
17
19
20
30
31
33
37
50
53
57
Check DIP switches and control unit connection
Check DIP switch setting
Check DIP switch setting, check plug-in connections
of the strips
Reset the sender power
Check contactor monitor (see 5.3.6 Contactor monitor)
Blanking procedure completed, reset DIP switches
Release "Test" button
Release "Machine Control" button
Check the sender and receiver type assignment.
Check connection system.
Check connections
Check plug-in connections and type assignment of
the strips
Re-calibrate sender power, check supply voltage
Check the sender and receiver type assignment
Check plug-in connections and type assignment of
the strips
Re-calibrate sender power, check supply voltage
Restart interlock configuration incorrect
(jumper or control unit input)
DIP switch setting "restart interlock" has
changed during operation
DIP switch setting "No. of LGT" does not
coincide wilth the actual number con-
nected
Incorrect sender and receiver configuration
Contactor monitor not working
Blanking successfully completed
Wait until "Test" button is again released
Wait until "Machine Control" button is re-
leased
No. of beams on sender and receiver not
identical
Sender and receiver reversed
Status signal error from strip 1
Excessively high received signal for given
range or supply voltage too low
No. of beams on sender and receiver not
identical
Status signal error from strip 2
Excessively high received signal for given
range or supply voltage too low
No.
Fig. 25. Seven-segment display
