Understand Integrated Safety Drive Replacement; Replace An Integrated Safety Drive In A Guardlogix System - Allen-Bradley PowerFlex 755 User Manual

Chapter 4 Standard I/O – Network STO Programming and Operation
Understand Integrated
Safety Drive Replacement
Replace an Integrated Safety
Drive in a GuardLogix System
48
GuardLogix controllers retain I/O device configuration onboard and are able
to download the configuration to the replacement device.
IMPORTANT If the replacement card/module was used before, clear the existing
configuration before installing the card/module on a safety network by
resetting the card/module to Hardwired Safe Torque Off mode. See
of-Box State on page 26
Replacing an entire PowerFlex 755 drive or PowerFlex 755T drive product on
an integrated safety network is more involved than replacing standard devices
because of the safety network number (SNN). The device number and SNN is
the safety Device ID of the device. Safety devices require this complex
identifier to make sure that duplicate device numbers do not compromise
communication between the safety devices. The SNN is also used to provide
integrity on the initial download to the PowerFlex 755 drive or PowerFlex
755T drive product.
When the Logix Designer application is online, the Safety tab of the Module
Properties dialog box displays the current configuration ownership. When the
opened project owns the configuration, Local is displayed.
A communication error is displayed if the module read fails. See
Integrated Safety Drive in a GuardLogix System on page 48
safety drive replacement examples.
ATTENTION: During replacement or functional testing of a device, the safety
of the system must not rely on any portion of the affected device.
IMPORTANT The replacement of safety devices requires that the replacement device is
properly configured, and that the proper operation of the replacement
device is verified.
Two options for I/O device replacement are available on the Safety tab of the
Controller Properties dialog box in the Logix Designer application:
• Configure Only When No Safety Signature Exists
• Configure Always
Rockwell Automation Publication 750-UM004B-EN-P - October 2018
for more information.
Replace an
for integrated
Out-