191
F3SJ-A
User’s Manual
Chapter
7
Tro
ubles
hoot
in
g
Appendix
E
Effect of noise is excessive.
If other devices using the same
power supply generate noise, do
not share the same power supply
with other devices and use it as
that exclusive for the safety
component.
The inductive noise tends to be
induced especially if the power
line and the power supply line are
arranged in parallel. Arrange the
exclusive power supply near the
light curtain or lay the power line
away from the power line.
If the power supply for operation
is located near the power supply
and it uses the same ground, it is
subject to the influence of
common mode noise from the
ground. Separate the grounding
point or use it as the exclusive
ground.
Failure of safety output circuit.
Replace the receiver.
Connection positions are reversed
for emitter(s) and receiver(s), or
their directions are upside down.
Correct connection positions and
directions of all F3SJs.
Series connection
cable error (1)
Safety output error occurred due
to short circuit, breakage, or
disconnection of series
connection cables.
Check if series connection cables
are connected properly. Replace a
series connection cable if it is
broken.
66, 67, 68, 69 Safety output
error (2)
Safety output lines are short-
circuited to each other after power
on.
Wire the output lines properly.
Check the control output is in
contact with other lines at the
device or the connection.
Safety output line and 24V, 0V, or
other input/output line are short-
circuited after power on.
Series connection
cable error (2)
Safety output error occurred due
to short circuit, breakage, or
disconnection of series
connection cables.
Check if series connection cables
are connected properly. Replace a
series connection cable if it is
broken.
70
External indicator
output error
The external indicator output and
24V, 0V, or other input/output line
are short-circuited when diagnosis
function of an external indicator
output is being enabled. Or, an
external indicator output line is
broken.
Perform the proper wiring.
Load (such as indicator or relay)
connected to an external indicator
output is broken.
Replace the load.
Failure of external indicator
circuit.
Replace the F3SJ.
Emitter Receiver
Error code
Error Description
Cause
Solution
A
B
C
A
B
C
A
B
C
A
B
C
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of
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Control
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