KEYENCE SL-R11 - Manual (Page 39)

Chapter 7 Troubleshooting
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ENGLISH
Bar LED display status
Receiver
Description Causes and solutions
Transmitter
OSSD error
• The cable connected to the SL-C has its transmitter and receiver ends reversed.
Connect the cable properly as described in section 2-3-1 “Connecting Cable
Installation” (
➮2-7) in the SL-C manual.
• Reconnect the SL-R11 to the SL-C as described in section 4-1 “Method for
Connection to the SL-C Series” ( ➮4-1) in the SL-R11 manual.
• The OSSD is damaged. Replace the sensor.
7 lights up 7 and all lamps
alternatively flash
8 lights up 8 lights up
FSD error
• The SL-R11’s FSD has failed due to contact adhesion or a similar cause.
Replace the relay board as described in section 4-2-1 “How to replace the relay
output terminal block”
( ➮4-2) in the SL-R11 manual.
• Verify that the relay board has been installed properly as described in section 4-
2-1 “How to replace the relay output terminal block” ( ➮4-2) in the SL-R11
manual and 6-2 “Relay Circuit Board Replacement” ( ➮ 6-1) in the SL-R11
manual.
1 flashes 1 flashes
No beam is being
received
• Either the beam axes are completely misaligned, or are being blocked by a
shielding object. Readjust the beam axes as described in section 3-9 “Beam Axis
Adjustment”
( ➮3-8) in the SL-C manual.
• Verify that the operating distance does not fall outside of the range indicated by
the specifications.
• The switch setting is not correct. Configure the switch properly as described in
section 4-3-4 “Connecting to Main/Sub Select Input Terminal” ( ➮ 4-7) in the SL-
R11 manual.
• The test input terminal is open. Short the test input terminal during normal use
as described in section 4-3-5 “Wiring to the Test Input Terminal” ( ➮ 4-8) in the
SL-R11 manual.
Multiple lamps
light up red
Multiple lamps
light up red
Beam is being
blocked
• Some of the beam axes are misaligned or are being blocked by an obstacle.
Readjust the beam axes as described in section 3-9 “Beam Axis Adjustment”
( ➮3-8) in the SL-C manual.
• Verify that the operating distance does not fall outside of the range indicated by
the specifications.
All lamps flash green All lamps flash green
Unstable light
reception
(allowance of
100 to 110%)
• The beam axes are not completely aligned, or are being blocked by an obstacle.
Readjust the beam axes as described in section 3-9 “Beam Axis Adjustment”
( ➮3-8) in the SL-C manual.
• Verify that the operating distance does not fall outside of the range indicated by
the specifications.
• Dirt, oil is building up on the heads. Crean them with wet cloth.
All lamps are off All lamps are off
Power has not yet
been turned on
• Power is not being properly supplied to either the SL-C or the SL-R11. Check
the cable connector, the power supply connector, and the power supply voltage.
• Either the SL-C or the SL-R11 is damaged and needs to be replaced.
1 flashes All lamps are off
The power supply
voltage drops
• The power supply voltage drops consecutively or instantaneously.
• Replace the power supply or increase the power supply capacity.
• Stop supplying power to other devices, and use the dedicated power supply.
When attempting any of the solutions described above, be sure to follow the appropriate procedures
properly, after referring to all necessary manual sections. Contact your nearest Sales Office if the device
fails to resume normal operation after the above solutions are implemented, or if your system exhibits
problem symptoms other than those described above.
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