Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 599)

Section 10B
9/Series Adapter Modules for
1771 and 1746 I/O Devices
10B-10
This section provides diagnostic information for troubleshooting your 1746
I/O chassis using the LEDs on the front of the 1746I module. Also in this
section is information on using test modes to diagnose any problems with
the fiber-optic connections.
OFF
ON
Flashing
This LED Status
Indicates this possible cause:
Run LED On ·The I/O ring and the 1746 I/O rack are
communicating properly and the rack is
functioning.
Rack LED On ·RAM or ROM failure at power turn on.
·Device in rack failed or is not seated properly.
·Internal error in the 1746I adapter.
Rack LED Flashing
·A card type was found in the rack at power turn
on that is not supported by the 1746I module.
Ring LED On ·Connection or device has failed in the I/O ring for
a device before the 1746I in the ring.
·Power turned off at the CNC.
·Transmitter and receiver cables are reversed.
Ring LED Flashing
·Connection or device has failed in the I/O ring for
a device after the 1746I in the ring.
All LEDs Off ·Power turned off at the CNC while the ring was
up and running.
·Connection of I/O ring broken before this 1746I
module while the ring was up and running.
Use this section to calculate the number of ASRN chips used by the 1771
or 1746 I/O chassis in your system. Each chassis uses a different number
of ASRN chips depending on the size of the chassis and the number and
types of I/O devices in the chassis.
Each different 9/Series control supports a limited number of ASRN chips
on its I/O ring. Refer to Table 10A.B for the number of ASRN chips
supported on the ring for your specific 9/Series processor.
10B.2.5
Troubleshooting the 1746I
Communication Module
10B.3
1771 and 1746 I/O adapter
ASRN Use