Omron F3SG series User Manual page 80

System Operation and Functions
<Timing chart>
Muting sensor A1
Muting sensor B1
Muting sensor B2
Muting sensor A2
Muting state
Auxiliary output
Beam state
OSSD
<Reference: Preventing light interference of muting sensor>
When a photoelectric sensor is used as a muting sensor, light interference may cause a muting error of
F3SG-RA.
The cause and measures for light interference are shown as follows:
Reflected light
A1 B 1
F3SG-RA
(1)
(1) Interference between muting sensors
• Use sensors with mutual interference prevention (such as retro-reflective E3Z-R series)
• Use laser-type sensors (such as laser-type E3Z-LR series)
• Take distance from a sensor causing the interference
• Displace beams for each other to prevent interference (change installation height or place them
crosswise)
• Install a physical barrier
• Attach interference prevention filter (provided for E3Z series as accessories)
• Attach a slit to reduce light intensity (provided for E3Z series as accessories)
• Lower the sensitivity
• Reduce a distance between a workpiece and a muting sensor to prevent reflected light from a workpiece
F3SG-R
56
User's Manual
T3 (0.1 s) max.
ON
OFF
T1min to T1max
ON
OFF
ON
OFF
ON
OFF
80 ms max.
Enabled
Disabled
Blinking
OFF
Unblocked
Blocked
ON
OFF
B2 A2 A 1 B1
Workpiece
(1)
T3 (0.1 s) max.
T3 (0.1 s) max.
T3 (0.1 s) max.
T2 max.
Blinking at 0.5 s (1 Hz)
Direct light
B2 A2
F3SG-RA
Workpiece
(1) (1)
Light from other F3SG-RA
A1 B1 B2 A2
F3SG-RA
Workpiece
(2)
(3)
D