Maintenance And Service; Self Diagnostics; Fault Localization - ABB SRIO 500M User Manual And Technical Description

Maintenance
and service
Self-diagnostics

Fault localization

14
If the self-supervision system of the SRIO 500M
unit detects a fault on one of the serial inter-
faces, the fault relay is activated and the "FAULT"
indicator on the front panel and one of the "SE-
RIAL IF" indicators are lit.
The fault can be localized and repair measures
can be taken using the following table:
Fault type
Supply failing
Line fault
Display terminal
failure
Recognition
Fault relay is activated.
Front panel "ON" light dark
Fault relay is activated.
One of the front panel
"SERIAL IF" ligths is on
No response, when a
command is given or
Return/Enter key is pressed
Repair step
Check and repair
the power supply
Check the connections.
Check the serial interface setup
Check the data definitions
Check the event poll list
Check the devices connected to
the serial interface line
Check the DIL switches on
communication board
Check the cable
Check the terminal
Check the setup parameters of
the terminal
Check front panel switch 1