6-1 Upper Most/ Lower Most Beam Indicators
6 DIAGNOSTIC AND TEST FEATURES
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6 DIAGNOSTIC AND TEST FEATURES
6-1 Upper Most/ Lower Most Beam Indicators
The F3SL system has a visible, red Upper Most/Lower Most Beam Indicators (BI), adjacent to one for upper most
and another one for lower most infrared beam. These BI are located on the receiver. The BI will light when the
infrared beam fails to meet the conditions necessary for the F3SL system to remain in the machine run state.
When the synchronization beam is broken, all BI will light.
BI are not a safety critical component. An BI failure will not cause a alarm condition and the F3SL system will
continue to operate.
6-2 Synchronization Beam
Synchronization between the F3SL system emitter and receiver is optical. The beam closest to the cable con-
nector supplies this signal. When this beam is blocked, the system will enter a machine stop state and both
Beam Indicators (BI) will light. When the beam is cleared, the system will resynchronize itself and enter a state
consistent with its operating mode.
6-3 Machine Primary Control Element (MPCE) Monitoring
MPCE monitoring is an important safety function. It monitors the F3SL system interface to the guarded machine
and checks to ensure that the control elements are responding correctly to the light curtain and to detect any
inconsistency between the two machine MPCE. This is necessary to detect a malfunction within the interface
which presents a stop signal from reaching the machine controller.
Connections for MPCE monitoring are made at the receiver. On power-up, the F3SL system looks for an MPCE
closed condition. If this is found, it will enter a state consistent with the selected operating mode. When the F3SL
system enables its safety outputs, it monitors the MPCE for a closed-to-open transition. This transition must oc-
cur within 300 ms or the F3SL system considers the MPCE alarmed. The F3SL system will then enter an alarm
state. Additionally, if the MPCE connectors are incorrectly wired, the F3SL system will enter an alarm state.
Note:
For proper operation of the F3SL system when MPCE is not active, the MPCE input must be wired to the
F3SL system ground.
6-3-1 Activating and Deactivating MPCE Monitoring
MPCE monitoring is activated by setting position 3 of Switches A and B located inside the receiver end cap. Re-
fer to Figure 3-1 and Table 6-1. Any mismatch between the settings of Switches A and B will result in an alarm
condition. To access Switches A and B, remove the four captive screws which secure the largest receiver end
cap. Set these switches before mounting the receiver.
WARNING
Disconnect power before removing end caps.
Table 6-1 MPCE Switch Settings
Switch A
Switch B
MPCE MONITORING
ACTIVE OR NOT ACTIVE
3
3
Active
OFF
OFF
Not Active (default setting)
ON
ON
Summary of Contents for F3SL
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