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National Instruments Corporation
C-1
Appendix
C
READY LED Signaling
This appendix describes how to interpret the READY LED error codes.
READY LED Overview
The READY LED has several purposes on the GPIB-ENET. When you
first power on the GPIB-ENET, the READY LED flashes quickly while
it completes its power-on self-tests. When the tests complete
successfully and the IP address is assigned from either nonvolatile
memory or the network, the READY LED remains steady, indicating
that the unit is ready to operate.
During operation, the READY LED might begin to blink slowly. This
occurs after running the Firmware Update utility, when the
GPIB-ENET reports status on the operation. At other times, the
READY LED blinks slowly to alert you of internal GPIB-ENET errors.
For assistance in correcting this problem, use this appendix to interpret
and record the pattern that the READY LED flashes, and then contact
National Instruments.
Note:
By recording the READY LED status messages before calling National
Instruments, you can save yourself time, and the GPIB Product Support
Department can answer your questions more accurately and efficiently.
Do not switch off power to your GPIB-ENET before recording the flashing
READY LED pattern.
READY LED signaling can report up to 100 different errors. The errors
are numbered from 0 to 99 and are reported through sequences of
READY LED flashes.
Step 1. Count the Long Flashes
A 3-second interval, during which the READY LED is OFF, separates
each repetition of the sequence. The sequence begins with a series of
long 1-second flashes—that is, one second ON, one second OFF. These
long flashes represent the digit in the tens column. The long flashes
