87
F3SJ-B
User’s Manual
Chapter
6
T
roub
le
shoo
ting
Appendix
E
Description
Cause and measures
Cap error
A cap may be detached. Attach the cap properly.
Communication error
The communication line or other wiring may be broken or short-circuited.
Check the wiring and cables.
A power cable may be detached.
Check connectors of the power cable.
If the wiring is extended with cables other than specified, the cables used for extension may not
have performance equivalent or greater than the specified cables. Use cables with the same
performance or more than the specified cables.
See "Wiring" in Chapter 3.
Safety output error
Safety output lines may be short-circuited to each other or another signal line may be short-
circuited to the safety output line.
Wire the safety output lines properly.
See "Wiring Diagrams" in Chapter 2 or "Wiring" in Chapter 3.
Internal error
An error may have occurred in the internal circuit.
Replace the F3SJ-B.
Configuration error of emitter-
receiver combination
A model name does not match between emitter and receiver. Check that the emitter and receiver
are the same model.
Series connection cables may have been short-circuited, broken or disconnected. Check if series
connection cables are connected properly. Replace a series connection cable if it is broken.
Ambient light error
The receiver may be receiving light emitted from another photoelectric switch or F3SJ-B.
See "Mutual Interference Prevention" in Chapter
Safety output error due to power
supply voltage or noise
The power supply voltage may have dropped temporarily when the F3SJ-B is in operation.
Check for temporary power supply voltage drop (by about 12 VDC) by the influence of the
inductive load, etc.
If the exclusive power supply is not used, check the power consumption of other connected
devices for enough capacity.
Effect of noise may be excessive.
If other devices using the same power supply generate noise, do not share the same power supply
with other devices, and use a separate power supply exclusively for the safety components.
The inductive noise tends to be induced especially if the power supply line of the machine guarded
and the power supply line of the F3SJ-B are arranged in parallel.
Arrange the exclusive power supply near the F3SJ-B or lay the power supply line of the F3SJ-B
away from the power supply line of the machine guarded.
If the power supply for the F3SJ-B is located near the power supply of the machine guarded 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.
Power supply voltage may be outside the rated range.
Connect the F3SJ-B to a 24 VDC±20% power supply voltage.
Voltage fluctuation may have occurred due to insufficient power supply capacity.
Replace the power supply with one that has a larger capacity.
Instantaneous break or instantaneous stop may have occurred due to power sharing with other
devices. Do not share the power supply with other devices. Connect the F3SJ-B to a power supply
that is dedicated to electro-sensitive protective devices for electro-sensitive protective equipment
such as the F3SJ-B, safety controller, etc.
Communication error due to power
supply voltage or noise
Communication error may have occurred due to noise.
Check the noise level in the environment around the communication line.
The power supply voltage may have dropped temporarily when the F3SJ-B is in operation.
Check for temporary power supply voltage drop (by about 12 VDC) by the influence of the
inductive load, etc.
If the exclusive power supply is not used, check the power consumption of other connected
devices for enough capacity.
Summary of Contents for F3SJ-B Series
Page 1: ...F3SJ B N25 01T Series Safety Light Curtain User s Manual Cat No SCHG 735E...
Page 12: ...x Introduction F3SJ B User s Manual...
Page 30: ...16 Chapter 2 Description of Functions F3SJ B User s Manual System Configuration and Functions...
Page 84: ...70 Chapter 3 Wiring F3SJ B User s Manual Wiring Installation...
Page 90: ...76 Chapter 4 Wiring Examples F3SJ B User s Manual Input Output Circuit and Applications...
Page 96: ...82 Chapter 5 Maintenance Checklists F3SJ B User s Manual Checklists...