Rockwell Automation 1732DS-IB8 User Manual page 30

26 Understand the Operation of Safety Functions
Publication 1791DS-UM001H-EN-P - April 2009
Fault Recovery
If an error is detected, the safety input data remains in the off state.
The procedure for activating the safety input data again is as follows.
1. Remove the cause of the error.
2. Turn off the safety input.
The safety input status turns on after the input-error latch time
has elapsed. The I/O indicator (red) turns off. The input data
can now be controlled.
Input Delays
On-delay - An input signal is treated as being off during the on-delay
setting time (0...126 ms, in increments of 6 ms) after the input
contact's rising edge. The input turns on only if the input contact
remains on after the on-delay time has elapsed. This helps prevent
chattering of the input contacts.
On-delay
Off-delay - An input signal is treated as being on during the off-delay
setting time (0...126 ms, in increments of 6 ms) after the input
contact's falling edge. The input turns off only if the input contact
remains off after the off delay time has elapsed. This helps prevent
chattering of the input contacts.
Off-delay
Input Signal
OFF
ON
Remote I/O Data
Safety Input OFF
44094
44095
OFF-delay