User manual

Publication 1756-RM093F-EN-P - January 2010 31
CIP Safety I/O for the GuardLogix Control System Chapter 3
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.
Safety Considerations for
CIP Safety I/O Modules
You must commission all devices with a node or IP address and
communication rate, if necessary, before their installation on a safety
network.
Ownership
Each CIP Safety I/O module in a GuardLogix system is owned by one
GuardLogix controller. Multiple GuardLogix controllers and multiple
CIP Safety I/O modules can be used without restrictions in chassis or
on networks as needed. When a controller owns an I/O module, it
stores the module’s configuration data, as defined by the user. This
controls how the modules operate in the system.
From a control standpoint, safety output modules can only be
controlled by one controller. Each safety input module is also owned
by a single controller; however safety input data can be shared
(consumed) by multiple GuardLogix controllers.
Safety I/O Configuration Signature
The configuration signature defines the module’s configuration. It can
be read and monitored. The configuration signature is used to
uniquely identify a module’s configuration. When using a GuardLogix
controller, you do not have to monitor this signature. It is monitored
automatically by the GuardLogix controller.