Siemens ADVANCE NETWORK COMMUNICATIONS BOARD/DATANET 20005 User Manual download pdf (Page 59)

ANCB LEDs Description and Operation

Description

This section provides maintenance personnel with information on how to

use the ANCB LEDs for troubleshooting the Advance Network

Communications Board.

Communications

Board LEDs

Refer to Figure 4-2 for LED position and labeling.

At power-up the top row of LED indicators will blink on briefly as the

board passes its various power-up sequence tests. The ADHA green

light indicates that the initial program parameters were successfully

moved from FLASH to RAM memory. The ADHA yellow LED indicates

that the board has passed its power-up RAM test, the ADHA red LED

indicates that the board has passed its power-up FLASH integrity test,

and the ADHB green LED indicates the board has begun its normal

program execution. After approximately 5 seconds the indicators will go

off depending upon the current board conditions.

Power-UP

In normal board operation the ADHA LED’s are used to indicate the

status of the Data Hiway channel and the DNETB LED’s indicate the

status of the DataNET channel. In normal operation the ADHA green

LED blinks to indicate either transmit or receive activity has occurred on

the Data Hiway channel. The yellow LED will blink to indicate any

transmit or receive errors that have occurred.

Normal Operation

The DNETB LED’s provide a link status indication for the DataNET

channel. If the DataNET link is up and communicating the DNETB green

LED will be lit. If the link is down or in the process of establishing a

connection the DNETB red LED will be lit.

If the ANG/DN board has a power-up failure or other catastrophic failure

during normal operation the red Fault LED will light to indicate that a fault

has occurred and the yellow LED will blink an error code, see Table 3-1

Error Codes.

Board Fault Indicators

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Siemens ADVANCE NETWORK COMMUNICATIONS BOARD/DATANET 20005 User Manual Page 59