52
Chapter
2
Mu
ting Sys
te
m
F3SJ-A
User’s Manual
System Configuration and Functions
Override Function
The override function forcibly turns the safety outputs ON when the muting start condition is not
satisfied. If a workpiece stops while passing through the detection zone of the F3SJ, as shown below,
causing a muting error, the normal state cannot be recovered unless the workpiece is removed from
the muting sensors and the detection zone of the F3SJ. However, the override function will mute the
safety outputs of the F3SJ so that the conveyor can be restarted to move the workpiece out of the
muting sensors and F3SJ detection zone.
The override function can be enabled for up to 60s. (The setting tool can be used to change this time to
between 1 and 600 sec.)
The muting lamp (external indicator) blinks while overriding. (The setting tool can be used to change
this setting.)
The muting and override functions disable the safety functions of the device. You must ensure safety
using other method when these functions are operating.
Muting lamps (external indicators) that indicate the state of the muting and override functions must be
installed where they are clearly visible to workers from all the operating positions.
Install the switch that uses hold-to-run device such as a spring-return key switch and is installed in a
location that provides a clear view of the entire hazardous zone and where it cannot be activated from
within the hazardous zone. Make sure that nobody is in the hazardous zone before activating the
override function.
Override Start Conditions
If all of the following conditions are present in the F3SJ, the override function starts. The override
function can be put into effect even when there is a muting error.
1. If either muting input 1 or 2 is ON (1 or more muting sensors are turned ON by a workpiece)
2. The F3SJ is blocked and the output is OFF
3. Under the conditions of 1 and 2 shown above, the reset input changes from ON to OFF and the test
input changes from OFF to ON at the same time. The changing time of these 2 inputs must be 0.3s
or less.
Override End Conditions
When either of the following conditions is satisfied, the function is released.
F3SJ
F3SJ
B1
A1
Workpiece
Reflector
Reflector
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of
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