Omron Sti F3SJ-A Series User Manual page 211

Emitter Receiver Error code
66, 67, 68, 69 Safety output
C C
B
B
A A
70
C
C
B B
A
A
Error Description
Effect of noise is excessive.
Failure of safety output circuit.
Connection positions are reversed
for emitter(s) and receiver(s), or
their directions are upside down.
Series connection Safety output error occurred due
cable error (1) to short circuit, breakage, or
disconnection of series
connection cables.
Safety output lines are short-
error (2) circuited to each other after power
on.
Safety output line and 24V, 0V, or
other input/output line are short-
circuited after power on.
Series connection Safety output error occurred due
cable error (2) to short circuit, breakage, or
disconnection of series
connection cables.
External indicator The external indicator output and
output error 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.
Load (such as indicator or relay)
connected to an external indicator
output is broken.
Failure of external indicator
circuit.
Cause
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.
Replace the receiver.
Correct connection positions and
directions of all F3SJs.
p.124
Check if series connection cables
are connected properly. Replace a
series connection cable if it is
broken.
Wire the output lines properly.
Check the control output is in
contact with other lines at the
device or the connection.
Check if series connection cables
are connected properly. Replace a
series connection cable if it is
broken.
Perform the proper wiring.
Replace the load.
Replace the F3SJ.
Appendix
Solution
F3SJ-A
191
User's Manual
E