Allen-Bradley GuardLogix 5570, User Manual

Page: 53 / 172

Rockwell Automation Publication 1756-UM022D-EN-P - May 2017 53
Configure the Controller Chapter 3
Handling I/O Device
Replacement The Safety tab of the Controller Properties dialog box lets you define how the
controller handles the replacement of an I/O device in the system. This option
determines whether the controller sets the safety network number (SNN) of an
I/O device that it is connected to and has configuration data for when a safety
task signature
(1)
exists.
Follow these steps to configure how the controller handles the replacement of
an I/O device in the system.
1. Open the Controller Properties dialog box.
2. Click the Safety tab.
3. Select the configure option for the controller to use when replacing
safety I/O.
4. Click OK.
Figure 8 - I/O Device Replacement Options
(1) The safety task signature is a number used to uniquely identify each project’s logic, data, and configuration, thereby protecting
the system’s safety integrity level (SIL). See Safety Task Signature on page 14 and Generate a Safety Task Signature on page 120
for more information.
ATTENTION: Enable the Configure Always feature only if the entire
routable CIP safety control system is not being relied on to maintain
SIL 3 during the replacement and functional testing of a device.
See Chapter 5, Add, Configure, Monitor, and Replace CIP Safety I/O
Devices for more information.