Operation
SF4C Safety light curtain
92
4.3 When an Error Occurs
If a sensor error is detected, the sensor will turn the control output (OSSD 1, OSSD 2) OFF.
Then the digital error indicator (red) on the receiver lights up and the fault indicator (yellow) on
the emitter and receiver lights up or blinks.
•
If an emitter error is detected, the emitter will be locked out, stopping its emission, and
the control output (OSSD 1, OSSD 2) will be turned OFF.
•
If a receiver error is detected, the receiver will be locked out, and the control output
(OSSD 1, OSSD 2) will be turned OFF. Also, the test input indicator (orange) of the
emitter lights up.
Indicator symbol
Explanation
Blinks yellow
Lights up orange
Lights up green
Turns off
Indicators
Setting
procedure
Emitter
Receiver
Control
output
(OSSD 1,
OSSD 2)
Normal state
(Note 1 and 2)
RECEPTION
RECEPTION
ON
Error state
(Note 1 and 2)
RECEPTION
RECEPTION
OFF
NOTE
1. The figure shows the status of the emitter/receiver indicators during
operation when you are using a PNP output. When you are using an NPN
output, the NPN indicator lights up orange.
2. Since the color of the operation indicator changes according to whether the
control outputs (OSSD 1, OSSD 2) are ON or OFF, the operation indicator on
the light curtain is marked 'OSSD'.
3. To remove the source of the error (see page 103).
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