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© 2005 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-3 and the commencement of data combining.

Red, 

No flashing

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 flashing

Flash updating mode,

No error

No response required. LED will stay red for the duration of the 

flash update operation (using Flash Centre). Once operation

complete, NDC hardware will be automatically reset.

Amber,

No flashing

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 flashing

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-3 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-3 hardware. Flash rate proportional to Rx rate.

Error conditions

If  the  error  persists  the  NDC-3  unit  should  be  returned  to 

Actisense™

 (refer to the 

Contact Information

 section).

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-3 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-3 hardware and any other devices should be checked as a matter of course, before continuing 

with this guide.

 

Diagnostic LED

The NDC-3 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.

Содержание NDC-3

Страница 1: ...er NDC 3 B User Manual Issue 1 31 Multiple talker interface for use with the NMEA 0183 standard Serial data networking of marine electronic devices instruments Personal computer RS232 interface to NME...

Страница 2: ......

Страница 3: ...mpatible RS 232 bi directional port 5 Technical features 5 Software updates 5 Connecting devices together 6 The basics 6 The NMEA signals 6 The different NMEA standards 6 Connections 7 Connecting to N...

Страница 4: ...n the NMEA sentence is validated Therefore the electronic device s supplying the NDC 3 with NMEA data retain s the sole responsibility for the NMEA data s validity Foreword Actisense recognises that i...

Страница 5: ...m drive capability The full differential output ensures better quality communications and lower noise emissions on unshielded twisted pair cabling Full speci cation RS232 interface ensures that any ma...

Страница 6: ...ine Tx or Out and used the ground as the other line similar to the way a computer serial port works This connection method is referred to as single ended instead of the differential method used by NME...

Страница 7: ...to a Personal Computer PC or other marine device capable of interfacing to a standard RS 232 port 4 Battery supply input Note 1 To complete the NMEA 0183 standard all device interconnection NMEA cable...

Страница 8: ...connection ID s Simply connect A to A and B to B refer to gure 2 NMEA Talker device 3 This device does not conform completely to the NMEA 0183 standard However by connecting to A and its G Ground to t...

Страница 9: ...ine and one for the RX line Use the spare wire in each pair as ground and connect the cable shield to ground only at the computer end 3 The TX of the NDC 3 should be connected to the RX of the compute...

Страница 10: ...ion Also indicates that no data is currently being received by the NDC 3 hardware Green Flashing 1 10 per second Normal and data Rx mode No error No response required A normal operation mode that indi...

Страница 11: ...e reduces to 2v 32 mA Output short circuit current 50 55 mA Baud rate xed see note 3 4 8 kbit sec Data propagation delay 1 0 100 ms RS 232 Input voltage range 15 15 V Input voltage threshold LOW 0 8 1...

Страница 12: ...202 746682 International 44 1202 746682 Fax 01202 746683 International 44 1202 746683 Actisense on the Web For advice support and product details E mail support actisense com Website www actisense com...

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