Allen-Bradley 1756-L61S ControlLogix 5561S, Справочное руководство

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28 Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
Chapter 3 CIP Safety I/O for the GuardLogix Control System
Diagnostics
CIP Safety I/O modules perform self-diagnostics when the power is turned ON
and periodically during operation. If a diagnostic failure is detected, safety input
data (to the controller) and local safety outputs are set to their safe state (OFF).
Status Data
In addition to safety input and output data, CIP Safety I/O modules support
status data to monitor module and I/O circuit health. Refer to your module’s
product documentation for specific product capabilities.
Status Indicators
The CIP Safety I/O modules include status indicators. For details on status
indicator operation, refer to the product documentation for your specific
module.
On- or Off-delay Function
Some CIP Safety I/O modules may support On-delay and Off-delay functions
for input signals. Depending upon your application, you may need to include
Off-delay, On-delay, or both when calculating system reaction time. For example,
the On to Off delay filter is helpful to filter out the pulse test from safety devices
that affect the input logic level.
See Appendix C 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 determining the input and output reaction times, refer to the
product documentation for your specific CIP Safety I/O module.
See Appendix C for information on calculating the system reaction time.