User manual

NMEA Data Multiplexer - NDC-4-A & NDC-4-A -USB
Page 35© 2009 Active Research Limited
LED Colour /
Flash Count
Mode / Error condition Required user response
Normal operation modes
The sequence below indicates a successful power-up of the
NDC-4 and the commencement of data combining.
Red,
No ashing
Start-up mode,
No error
No response required. A normal operation mode that should
last for no more than 1.5 seconds. Any longer indicates an
error with the main program.
Red,
No ashing
Flash updating mode,
No error
No response required. LED will stay red for the duration of the
ash update operation (using Flash Centre). Once operation
complete, NDC hardware will be automatically reset.
Amber,
No ashing
Initialise and self-test mode,
No error
No response required. A normal operation mode that follows
after the Start-up mode and should last for approximately 1
second.
Green,
No ashing
Normal and no data mode,
No error
No response required. A normal operation mode that follows
the Initialise and self-test mode. Indicates that no error was
detected during the self-test operation.
Also indicates that no data is currently being received by the
NDC-4 hardware.
Green,
Flashing
(1-10 per second)
Normal and data Rx mode,
No error
No response required. A normal operation mode that indicates
that data is currently being received (on at least one channel)
by the NDC-4 hardware. Flash rate proportional to Rx rate.
Error conditions
If the error persists, the NDC-4 unit should be returned to
Actisense (refer to the Company Information section).
Please contact Actisense before returning the unit in
order to obtain a Returns form. Any returns sent without a
Returns form will incur a delay in being processed.
Amber,
Flashing
(Once every 4
seconds)
Error trap mode,
EEPROM memory error
An error with the EEPROM memory has been detected during
the self-test mode.
Reset the NDC-4 hardware.
Table 1 – Diagnostic LED colours
Troubleshooting guide
This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore, the
cables between the NDC-4 hardware and any other devices should be checked as a matter of course, before continuing
with this guide.
Diagnostic LED
The NDC-4 hardware supports a tri-colour diagnostic LED that indicates the current operating mode of the hardware, or
if an error has been detected during the self-test initiation process. Table 1 details what each LED colour represents and
if any user interaction is required.