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Safety Device Function Blocks Section 3-5
2. The maximum muting time has elapsed. In the following cases, however,
muting will stop and Output Enable will also turn OFF.
3. The light curtain is obstructed with the muting status stopped in conditions
1 or 2.
4. A discrepancy error has occurred in the AOPD signal.
5. A discrepancy error has occurred in the override signal (for dual setting
only).
Note The muting status will return if the muting start conditions are sat-
isfied.
Note In the above description, the muting sensors are ON when the workpiece is
detected and OFF when it is not detected.
Override Function The override function can be used, for example, to force a machine to operate
to remove an object that has stopped in the detection zone of the Safety Light
Curtain. The override function enables turning ON the Output Enable signal
even when the muting starting condition has not been satisfied.
Override Starting and
Stopping Conditions
Starting Conditions
The override will be started and Output Enable and Override Status will turn
ON when all of the following conditions are satisfied. The muting status will
turn ON.
1. At least one of the muting signals must be ON (i.e., the muting sensor must
be detecting a workpiece).
2. The AOPD inputs must be inactive (i.e., the Safety Light Curtain must be
obstructed).
3. Override input must be ON (for Single Input) or active (for Dual Inputs)
Note Override, however, will not start when operation starts.
Stopping Condition (Ending Condition)
Override will be stopped and Override Status will turn OFF when any of the
following conditions occurs. If the AOPD inputs are inactive (i.e., the Safety
Light Curtain is obstructed), the Output Enable signal will turn OFF.
1. All of the muting signals are OFF (i.e., the muting sensor must not be de-
tecting a workpiece).
2. The maximum override time has elapsed.
3. Override input is OFF (for Single Input) or Inactive (for Dual Input).
Startup All faults are turned OFF and all timers are reset at the start of operation. Out-
puts are turned ON or OFF according to the input status.
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