TTE Tech A664 Lab v2.0 User Manual page 24

5. STATE MACHINE
state makes it possible to access the system through the SHOP CLI from a serial terminal.
Transitions
Depending on the DB-25P configuration plug settings and whether errors are detected or not, the following
transition from the SHOP state is possible:
Transition to
QUIET
5.7 Error handling
The TTE-Switch A664 Lab v2.0's state machine transitions to either the QUIET or PASSIVE state if it
detects a catastrophic failure or anomaly.
Catastrophic failure examples
• BIST fatal error (e.g., the switch would take permanent damage)
• Unrecoverable position error (e.g., a position could not be read)
• Unrecoverable file error (e.g., no file exists for a given position, CRC error)
Anomaly examples
• Maintenance is ON and Grnd-Mode is OFF
• Shop-Mode is ON and Grnd-Mode is OFF
To avoid these anomalies, set Grnd-Mode to ON by default.
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Confidential and Proprietary Information
Shop-Mode Grnd-Mode
–
Maintenance
– –
23
Error
Catastrophic Failure
Document Number:
D-A664Lab-G-05-001