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ControlLogix ControlNet Interface Module
21
Publication
1756-IN604A-EN-P - February 2006
3.
Apply power to the module and check module status.
Use the following flowchart as a guide.
Turn the chassis
power supply on.
Module
status
indicator
red?
See the
Troubleshoot
section.
Module performs a
power-on self-test
initialization.
No
Yes
INIT
No
Yes
Module
status
indicator
red?
INIT has failed, and the
module displays an
error message. Refer to
Troubleshoot section.
Replace the module.
OR
WAIT
SRM
Modules are in a
redundant control
chassis pair.
Initialization is
complete. The
status indicator
blinks green.
Channel A and B
indicators alternately
flash.
Channel A and B
indicators display the
network condition as
listed on page 28.
Module
status
displays
OK?
No
See the
Troubleshoot
section.
Yes
Module is functional
and operating.
OK
A#xx