ABB NMBA-01 Installation And Startup Manual page 33

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NMBA-01 Installation and Start-up Guide
Table 7-2 Modbus Error Codes during Operation.
Flash Code
Occasional flash Module on-line.
on Error LED Parity, CRC or unsupport-
ed command received.
Error LED flashes NMBA is OK, no response
continuously from the drive on fibre link.
All LEDs flash con- Watchdog time out.
tinuously at the
same time.
Continuous reboot. Drive configuration write
Fast blinking of ER- failed (DDCS link commu-
ROR LED for ap- nication fault).
prox. 2 sec.
repeated every few
sec.
Status
Check the wiring and earthing of
the module.
Verify that only supported com-
mands are sent to the module.
Power on the drive.
Check the fibre link wiring.
Hardware failure on NMBA mod-
ule. Switch power off and wait a
few seconds before switching the
power on again; if the problem
persists, check that fieldbus pa-
rameter 02 MODBUS MODE is
set to RTU wdg:rst.
Check fibre optics, DDCS channel
and SW version of the drive.
Chapter 7 – Fault Tracing
Correction
7-3