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Rockwell Automation Publication 1756-RM012B-EN-P - April 2018
Chapter 3
Safety I/O for the GuardLogix Control System
Status Data
In addition to safety input and output data, Safety I/O devices support status
data to monitor device and I/O circuit health. See the product documentation
for your device for specific product capabilities.
Status Indicators
The Safety I/O devices include status indicators. For details on status indicator
operation, see the product documentation for your specific device.
On-delay or Off-delay Function
Some safety I/O devices can support on-delay and off-delay functions for input
signals. In some applications, you must include off-delay, on-delay, or both
when you calculate system reaction time.
For example, the On-to-Off delay filter helps to filter out noise that affects the
input logic level.
See
on
for information on system reaction time.
Reaction Time
The input reaction time is the time from when the signal changes on an input
terminal to when safety data is sent to the GuardLogix controller.
The output reaction time is the time from when safety data is received from the
GuardLogix controller to when the output terminal changes state.
For information on how to determine the input and output reaction times, see
the product documentation for your specific Safety I/O device.
See
on
for information on how to calculate the system
reaction time.
Summary of Contents for Compact GuardLogix 5380
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