ABB NPBA-12 Installation And Startup Manual page 38

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