Page 40 of 60
2018-05-28
Installation DL2 Doppler Speed Log System
Remote acknowledge can be set up by aux input, by ACK or ACN (both from NMEA port and LAN).
Alarms are available for low speed (SOG and STW), high speed(SOG and STW) and system failure.
They can be activated or deactivated and given a unique alarm ID. Each alarm has its own unique
ID and message, and can be deactivated by making the ID zero.
The messages in use are as follows:
Alarm type Alert identier
(adjustable*)
Alert Text Mnemonic code
SOG SPEED HI 10234 ‘SOG Speed Hi’ SKP
SOG SPEED LO 10236 ‘SOG Speed Lo’ SKP
STW SPEED HI 10235 ‘STW Speed Hi’ SKP
STW SPEED LO 10237 ‘STW Speed Lo’ SKP
SYSTEM warning 10238 ‘SYSTEM ALARM’ SKP
* Note some systems may only accept 3 digits in ALR messages. In this case remove the 10XXX
According to INS standard IEC61924-2 Annex C speed logs may be able to handle “Speed Low
Alarm” as a Category B alarm. Acknowledge can be remote.
The DL2 has 4 I/O options for alarm communication:
-NMEA ALR/ALF message
-LAN ALR/ALF message
-AUX optocoupler
-Alarm relay
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