Omron NE1A-SCPU01 - 07-2009 - Reaction Time; Reaction Time Concepts; Calculating the Reaction Time

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Command Reference: Function Blocks Section 8-5
■ 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):
Machine’s Dangerous Area is on the Opposite Side of the Operator (Figure 2):
Note In the above example, limit switch 1 is wired to IN0 on the NE1A-series Con-
troller and limit switch 2 is wired to IN1. Set the dual channel mode for local
input in the NE1A-series Controller to dual channel complementary.
Light curtainLight curtain
IN0IN1
NE1A-series
Controller
ON OFF
Operator
Work platform
Guard fence
Limit switch 1
(N.O. contact)
Limit switch 2
(N.C. contact)
Light curtainLight curtain
IN0IN1
NE1A-series
Controller
OFF ON
Operator
Work platform
Guard fence
Limit switch 1
(N.O. contact)
Limit switch 2
(N.C. contact)