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Rockwell Automation Publication 520-UM002B-EN-E - December 2017
107
Network Control of Safe Torque-Off
Chapter 6
Understanding Integrated
Safety Drive Replacement
GuardLogix controllers retain I/O device configuration on-board and are able to
download the configuration to the replacement device.
Replacing a PowerFlex 527 drive that sits on an integrated safety network is more
complicated than replacing standard devices because of the Safety Network
Number (SNN). The device number and SNN make up the safety device's
DeviceID. Safety devices require this more complex identifier to make sure that
duplicate device numbers do not compromise communication between the
correct safety devices. The SNN is also used to provide integrity on the initial
download to the PowerFlex 527 drive.
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. Refer to
an Integrated Safety Drive in a GuardLogix System on page 107
for integrated
safety drive replacement examples.
Replacing an Integrated
Safety Drive in a GuardLogix
System
If you are relying on a portion of the integrated safety system to maintain SIL 3
behavior during drive replacement and functional testing, do not use the
Configure Always feature.
Use the Configure Always feature when you are not relying on the entire routable
integrated safety control system to maintain PLe/SIL 3 behavior during the
replacement and functional testing of a PowerFlex 527 drive. Drive replacement
is configured on the Safety tab of the GuardLogix controller.
(2) Displayed in the LCD display as Safety Fault.
IMPORTANT
If the replacement PowerFlex 527 drive was used previously, clear its existing
configuration before installing it on a safety network by resetting the drive to
its out-of-box condition. To see how this is done, refer to
Содержание PowerFlex 527
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