Omron G9SP Series

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Safety Device Function Blocks Section 3-5
2. Synchronization Time Check
1. Entrance
The time (T1) from when MS11 is detected until MS12 is detected must not
be greater than the maximum synchronization time. A synchronization er-
ror will occur in the following case.
• The maximum synchronization time from detecting MS11 until detect-
ing MS12 has elapsed.
2. Exit
The time (T1) from when MS22 is detected until MS21 is detected must not
be greater than the maximum synchronization time. A synchronization er-
ror will occur in the following case.
• The maximum synchronization time from detecting MS22 until detect-
ing MS21 has elapsed.
Muting Ending Conditions
1. Sequence Check
• If two or more Sensors are not ON, muting will end.
Note Muting will also end if the sensor status is not valid.
2. Maximum Time Check
• If the muting time exceeds the maximum muting time, muting will end.
Note The time for Safety Light Current muting to turn OFF is not moni-
tored.
■ Position Detection
In this application, the workpiece is mounted on a machine turntable sur-
rounded by a guard fence. The operator can disable the light-interruption sig-
nal of the light curtain safety function in order to set a workpiece on the
turntable when he is on the opposite side of the machine’s dangerous area.
Block Diagram
Machine’s Dangerous Area is on the Operator’s Side (Figure 1):
Guard fence
Light curtain
Light curtain
G9SP-series
Controller
Operator
Limit switch 1
(N.O. contact)
ON
OFF
Limit switch 2
(N.C. contact)
Si1 Si0
Work platform