4-1 Operating States
4 System Operation
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4 System Operation
A F3SL system is a microprocessor-controlled, infrared transmitted-beam safety light curtain. The system con-
sists of a receiver assembly and a emitter assembly. The receiver and emitter assemblies are not physically in-
terconnected.
F3SL system is often used where personnel protection is required. Typical applications include robotic work
cells, filter presses, injection molders, food processing equipment and automated assembly equipment.
4-1 Operating States
The operating condition of a F3SL system is described in terms of states. The following operating states exist
for the F3SL system.
4-1-1 Machine Run
The two receiver safety outputs are in the ON state, the green machine run indicator is lit, and the auxiliary output
is in a state consistent with its configuration. See Section 7-2 on page 13. The protected machine is allowed to
operate. Pressing and releasing the start button has no effect.
4-1-2 Machine Stop
The two receiver safety outputs are in the OFF state, the red machine stop indicator is lit, and the auxiliary output
is in the follow state consisitent with the safety outputs. See Section 7-2 on page 13. The protected machine is
not allowed to operate.
4-1-3 Interlock
The two receiver safety outputs are in the OFF state, the red machine stop indicator and yellow interlock indica-
tor are lit. The auxiliary output is in the follow state consisitent with the safety outputs. See Section 7-2 on page
13. The interlock state does not allow the protected machine to operate until the detection zone is clear of ob-
structions and the start button is pressed and released.
4-1-4 Alarm
The two receiver safety outputs are in the OFF state, the red machine stop indicator is lit, the yellow interlock
indicator is flashing, and the auxiliary output is in the OFF state. The alarm state does not allow the protected
machine to operate. The primary difference between alarm and interlock is that the F3SL system will remain in
the alarm state until the alarm is corrected, regardless of power cycling or an external start button press and
release.
4-2 Operating Modes
System operating modes determine the start-up and operating behavior of a F3SL system. Operating mode def-
initions rely on the operating states presented above. Operating mode selection is performed via configuration
switches in the removable cap on the bottom of the receiver.
Note:
If internal alarms are detected by the F3SL system during power-up or operation, it will enter the alarm
state with its safety outputs in the OFF state.
4-2-1 Automatic Start
A F3SL system will power-up with its safety and auxiliary outputs OFF, and, if the detection zone is not obstruct-
ed, enter the machine run state. In this state, when an object is sensed entering the detection zone, the F3SL
system will change from machine run to machine stop and remain in this state until the obstruction is removed.
Once the detection zone is clear, the F3SL system will automatically change from machine stop to machine run.
4-2-2 Start Interlock
The F3SL system will power-up with its safety outputs OFF, and, if no alarms are detected, enter the interlock
state. To enter the machine run state, the detection zone must be clear (or an Exact Channel Select pattern sat-
isfied), and then the operator must press and release the Start button. In the machine run state, when an object
is sensed entering the detection zone the F3SL system will change from machine run to machine stop. Once the
detection zone is clear, the F3SL system will automatically change from machine stop to machine run.
4-2-3 Start/Restart Interlock
A F3SL system will power-up with its safety outputs OFF, and, if no alarms are detected, enter the interlock state.
To enter the machine run state, the detection zone must be clear (or an Exact Channel Select pattern satisfied),
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