Hardware reference guide

Networking
240
35013379 11/2011
LED Indicators and Descriptions
The following figure shows the LED indicators for the RIO Head module.
The following table shows the LED descriptions for the RIO Head module.
LED Error Codes
The Blinking Com Act LED error codes for the RIO Head module table show the
number of times the Com Act LED on the RIO Head module blinks for each type of
error and the crash codes for each (all codes are in hex).
LED Descriptions
LEDS Color Indication When On
Ready Green The module has passed powerup diagnostics.
Com Act Green The module is communicating on the RIO network.
Error A Red There is a loss of communication on Channel A with one or more
of the drops.
Error B Red There is a loss of communication on Channel B with one or more
of the drops (dual cable only).
LED Error Codes
Number of Blinks Code Error
Slow (steady) 0000 Requested Kernel Mode
2 6820 hcb frame pattern error
6822 head cntrl blk diag error
6823 mod personality diag error
682A fatal start I/O error
682B bad read I/O pers request
682C bad execute diag request