Omron DST1-ID12SL-1 Operation Manual page 38

Description of Safety Functions
Dual Channels, Complementary
Error Recovery
14
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.
* Normal
ON
IN0
OFF
ON
IN1
OFF
ON
Safety input 0
OFF
ON
Remote
Safety input 1
I/O data
OFF
ON
Status of safety
inputs 0 and 1
OFF
* Error
ON
IN0
OFF
ON
IN1
OFF
ON
Safety input 0
OFF
ON
Remote
Safety input 1
I/O data
OFF
ON
Status of safety
inputs 0 and 1
OFF
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)
Discrepancy time
Discrepancy time
Error
Section 1-4