Omron DST1-ID12SL-1, Operation Manual

Page: 38 / 182

14
Description of Safety Functions Section 1-4
Dual Channels, Complementary
The status is treated as normal when one channel is ON and the other chan-
nel is OFF. When both channels are ON or both channels are OFF, it is treated
as an error, and the safety input data and the individual safety input status will
turn OFF for both inputs.
Error Recovery
All conditions below are necessary to recover from an error that has occurred
in a safety input.
• The cause of the error must be removed.
• The error latch time must have passed.
• The input signal must return to an inactive state and there must be no error condition
detected. (e.g., by pressing the emergency stop switch or opening a door)
IN0
IN1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Discrepancy time
Remote
I/O data
IN0
IN1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Discrepancy time
Remote
I/O data
* Error
Error
Safety input 0
Safety input 1
Status of safety
inputs 0 and 1
Safety input 0
Safety input 1
Status of safety
inputs 0 and 1
* Normal