ABB NPBA-12 - Page 38

Chapter 7 – Fault Tracing
7-2 NPBA-12 Installation and Start-up Guide
Table 7-2 Error indications.
Status LED Indications
Cause Remedy
MASTER MSG DDCS
RED RED OFF RAM test failure – Try resetting module.
– Contact ABB service representative.
OFF RED RED ROM test failure
(Last valid
state)
(Last valid
state)
RED *DDCS link failure – Check that drive is powered.
– Check fibre optic cables visually for dirt
or flaws.
– Ensure connectors are properly
inserted.
– Try new cables.
– Contact ABB service representative.
GREEN FLASHING
RED
FLASHING
GREEN
PROFIBUS
communication failure
(no data exchange)
– Check state of PROFIBUS master.
FLASHING
RED
RED FLASHING
GREEN
PROFIBUS link failure – Check state of PROFIBUS master.
– Check PROFIBUS cable wiring (see
Chapter 4).
*All errors that occur on the DDCS link between the NPBA-12 and the drive are reported to the PROFIBUS master
(bit 15 of the Status Word is turned on).