219
F3SG-R
User’s Manual
Chapter7 Troubleshooting
Appendix
E
7-1-2-3. Muting Sequence Error Indication
Sequence error indicator Cause and measures
Blinking: Once
Power supply may have been turned ON with muting input A or B being ON.
Check the condition of the muting sensors and light curtains.
muting input B may have been turned ON before muting input A was turned ON.
Check the condition of the muting sensors.
muting input A and B may have been turned ON at the same time.
•Check the arrangement of the muting sensors.
•Check if the wiring of muting input A and B is short-circuited.
Either muting input A or B may have been turned ON with the light curtain being blocked or in
Interlock State.
Check the condition of the light curtains.
Blinking: Twice
muting input B may have been turned ON within T1min (= 0.1 s
*1
) after muting input A was
turned ON.
•Check that if the muting sensors are installed too close each other.
•Check that if the speed of the workpiece is too fast.
*1 Factory default setting
It may have taken T1max (= 4 s
*1
) or longer for muting input B to be turned ON after muting
input A was turned ON.
•Check that if the muting sensors are installed too far each other.
•Check that if the speed of the workpiece is too slow.
*1 Factory default setting
The light curtain may have been blocked after muting input A was turned ON but before
muting input B was turned ON.
Check the condition of the light curtains.
Blinking: Four times
The light curtain may have been blocked within 0.08 s after muting input A and B were
normally turned ON.
•Check that if the muting sensor and light curtain are installed too close each other.
•Check that if the speed of the workpiece is too fast.
Muting may have been released after the light curtain entered the muting state but before a
workpiece blocked the light curtain.
•Check that the workpiece still remains.
•Check that the speed of the workpiece is too slow.
Blinking: Five times
The light curtain entered the muting state, but muting may have then been released while a
workpiece passes through the light curtain.
•Check that the workpiece still remains.
•Check that if the speed of the workpiece is too slow.
•Check that the muting sensors have been installed upstream and downstream of the light
curtain with the size of workpieces taken into account. (Using four muting sensors)
Blinking: Six times
Muting may have been released with muting input A and B remained ON after a workpiece
passed through the light curtain.
•Check that the workpiece still remains.
•Check that the speed of the workpiece is too slow.
Blinking: Seven times
The next muting sequence may have started after muting was released but before the initial
muting condition was established.
•Check that if a next workpiece has not entered before the current workpiece passes through
the light curtain.
•Check that if the interval between workpieces are too narrow.
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