Omron NE1A Series - Page 164

165
Command Reference: Function Blocks Section 6-5
■ 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 Set the dual channel mode for local input in the NEA1-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)