107
F3SJ-A
User’s Manual
Chapter
6
T
roub
le
shoo
ting
Appendix
E
Trouble under other state than lockout
The table below shows how to handle problems in which a sensor doesn't work while interlock indicator
and error mode indicator aren't flashing.
Power supply capacity
error
Power supply voltage is outside the
rated range.
Connect to a 24VDC
±
20% power
supply voltage.
Voltage fluctuation due to insufficient
power supply capacity.
Replace the power supply with one
that has a larger capacity.
Instantaneous break or instantaneous
stop due to power sharing with other
devices.
Do not share the power supply with
other devices, and connect to a power
supply that is dedicated to devices for
electro-sensitive protective function
such as the F3SJ, safety controller,
muting sensor, etc.
Cap error
Cap is not attached.
Attach the cap properly.
Failure of F3SJ's internal circuit.
Replace the sensor.
Mutual interference
error
Disturbance light is received.
Block the disturbance light.
The receiver is receiving light emitted
from another photoelectric switch or
sensor.
Light emitted from another F3SJ is
being received.
See Chapter 4 "Mutual Interference
Prevention".
Muting wiring error
The muting input 1 and 2, reset input,
and test input lines are not wired
properly.
Perform the proper wiring.
Communication error
The communication line is broken or
short-circuited with another input/
output line.
Check the wiring of the
communication line.
Communication error due to noise.
Check the noise level in the
environment around the
communication line.
Series-connection cable is
disconnected.
Check the connector between series-
connected sensors.
Failure of F3SJ's internal circuit.
Replace the sensor.
Phenomenon
Cause
Operation
Incident light intensity level indicators
aren't turned ON even if the sensor is
receiving light.
Communication line is not connected.
Check the communication line and
proper wiring.
Communication line is affected by too
much noise.
Check the noise environment around the
communication line.
Error mode indicator
Description
Cause
Solution
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
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