Rockwell Automation 8520 9/Series Hardware TAB 5 - Manual (Page 67)

Section 5A
9/440 Resolver–based CNC/Drive System
5A-65
All 9/440 Resolver–based CNC/Drives have four LEDs on the system
module and one LED on each axis module in the system. The LEDs
operate as follows.
System Module LEDs
The system module has four LEDs. They are:
LED Indicates
XILINX Under normal operation this LED is on. If it
turns off while the system module is under
power it indicates a XILINX hardware fault.
Contact your local Allen–Bradley Service.
WATCHDOG Under normal operation this LED is on. If it
turns off while the system module is under
power it indicates the watchdog has timed out
and a processor failure has occurred. Contact
your local Allen-Bradley Service.
R–I/O Only available on systems with remote I/O. This
LED illuminates when the remote I/O link is
communicating. See page 5A-35.
STATUS This is identical to the Watchdog LED but is
visible through the system modules front cover.
Figure 5A.47
System Module LED Locations (All Series)
9/440 Resolver–based
System Module
(All Series)
Open Cover
Press Cover
Release to Open
Wiring Board
WATCHDOG
XILINX
Status LED
R-I/O LED
(visible from under system
module in front of serial port B)
5A.7
9/440 Resolver–based LEDs