Rockwell Automation 1768-L45S Compact GuardLogix Controllers - Manual (Page 104)

104 Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Chapter 8 Monitor Status and Handle Faults
The Safety Status button itself indicates whether the controller is safety-locked or
-unlocked, or faulted. It also displays an icon that shows the safety status.
Icons are green when the controller is safety-locked, yellow when the controller is
safety-unlocked, and red when the controller has a safety fault. When a safety
task signature exists, the icon includes a small checkmark.
Monitoring Connections You can monitor the status of standard and safety connections.
All Connections
If communication with a device in the I/O configuration of the controller does
not occur for 100 ms, communication times out and the controller produces the
following warnings:
• The I/O indicator on the front of the controller flashes green.
• An alert symbol shows over the I/O configuration folder and over the
device that has timed out.
• A module fault is produced, which you can access through the
Connections tab of the Module Properties dialog box for the module or
via the GSV instruction.
Table 29 - Safety Status Icon
If the safety status is This icon is displayed
Safety Task OK
Safety Task Inoperable
Safety Unavailable
Offline
ATTENTION: Safety I/O and produce/consume connections cannot be
configured to automatically fault the controller when a connection is
lost. Therefore, you need to monitor for connection faults to be sure that
the safety system maintains SIL 3/PLe integrity.
See Safety Connections .