RDI Doppler BottomTrack Speed (ASCII) (Active) - 30

Description

Driver with user-interface to decode bottom track velocity and direction from an ASCII output data ensemble from an RD Instruments (RDI) Acoustic Doppler Current Profiler (ADCP) that is configured as a Doppler Velocity Log (DVL).

The driver returns the horizontal velocity ( Speed ) along with its direction ( Angle ) (and/or Bearing True). When decoding the PD6 message, vertical velocity is also returned.

Three different ASCII output formats are supported:

1. PD6
2. Remote Cherry
3. VmDas NMEA

For more information about these formats, see their entries in the Drivers Manual under Speed Log.

Driver Information

Driver	RDI Doppler BottomTrack Speed (ASCII) (Active)	Interface Type		Driver Class Type	Terminated
UTC Driver	No	Input / Output	Input	Executable	DrvRDIDopplerUI.exe
Related Systems	RDI Doppler BottomTrack Speed (ASCII) (Active) - 30 Speed Log
Related Pages

Decoding Notes

The RS-232 cable connection must have two-way direction, both receiving (Rx) and transmitting (Tx) data, since this driver will send commands to the unit and will receive data ensembles.

Database Setup

Make sure you set the baud rate as high as possible and that the FIFO buffers of the serial port are disabled (set as low as possible).

1. Vessel
   1. Angle
   2. Speed (Horizontal Speed)
2. ROV
   1. Angle
   2. Speed 
   3. Vertical Speed 

Values found during the (Dead Reckoning) calibration procedure need to be entered on this page, before commencing your survey to get the best real time results.

Online

• Active Driver Interface

  The user-interface can be found in the Windows taskbar:
  

  

  
  The driver is active, meaning commands can be sent directly to the unit by the user.
  Click on the RDI Doppler System in the taskbar to restore its dialog.
  

  

  

  
  Use the Advanced button to browse for a configuration text file containing predefined commands. For more information on each setting, use the context sensitive help ('?' button). 
  For detailed descriptions regarding the commands displayed below, please refer to the COMMANDS AND OUTPUT DATA FORMAT document by RDI (P/N 957-6156-00 (March 2014))
  
  

  • Bottom Track commands

    Command	Value	Range	Unit	Description
    BA	30	1-255	counts	Bottom Track (BT) filter setting
    BB	160	1-9999	dm	Band with selection 50%-25% boundary
    BC	220	0-255	counts	Bottom Track correlation filter
    BD	0	0-999	ensemble	Delay for BT detection after BT loss
    BE	1000	0-9999	mm/s	Error velocity
    BF	0	1-65535	dm	Depth guess (0=off)
    BI	010	0-999	m	Low / High gain mode boundary
    BK	0	1-3	times	Water mass Layers (0=disable)
    BP	001	1-999	pings	No. of pings for average
    BX	030	10-65535	dm	Max. expected depth for B.T. detection
    BL	80, 160, 240		dm	Water mass layers (if BK=0, do not care)
    BM	5	4, 5		BT mode
    BN	25			?
    BO	25			BT filter setting
    BR	0	0-2		0 = 4%, 1 = 2%, 2 = 1% depth resolution (effects ping rate)
    BS				Start pinging
    BW	00001	0-65535		No of water pings (do not care id BK = 0)
    BZ	004			?

  • Control system commands

    Command	Value	Range	Unit	Description
    CB	811			Baud rate 411 = 9600,8,none,1 811= 115200,none,1
    CF				Flow control
    CQ	?	0-255		Transmit power  0 = Low,  255 = High
    CR		0, 1		1= retrieve factory settings
    CS				Start pinging
    CX				Low latency trigger 0 = off, 1 = on
    CZ				Power down

  • Environmental commands

    Command	Value	Range	Unit	Description
    EX	01000			Coordinate transformations/corrections
    EC		1400-1600	m/s	Speed of sound

  • Timing commands

    Command	Value	Range	Unit	Description
    TE	00:00:00.20		hh:mm:ss.ss	Time between ensembles (ensemble rate) 00:00:00.00 = max. update rate
    TP	00:00.00		mm:ss.ss	Time between individual pings within ensemble

  • Water profile commands

    Command	Value	Range	Unit	Description
    WP	0	0-16384	pings	No of water profile pings per ensemble 0 = no water profiles

• Calibration

  

  
  

  

  
  Read the Help file for further instructions!

• Computation Setup

  The DVL is not visible in the equipment (devices) tree of the object.
  The observations of the DVL can be selected via the tabs Position Filter and Position Results of the object (Vessel / ROV) it is installed on:
  

  

  

  

  Smoothing Vessel or ROV Track

  Please read the Knowledge Base document 'How-to Smooth Vessel or ROV Track'.

  This document will give you additional information about the Computation Settings.

• Alert Display

  The Alert Display can be used to alert users on bottom track loss and exceeding the maximum speed.
  When the bottom track is lost the driver will return a speed of approx -32768 m/s, and will not be used by the computation.
  

  

  
  The Quality Indicators can also be used in the alert display. For more information follow the links under the driver description (on top).