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Simrad ITI Trawl System

Serial data communication and
NMEA 0183 message description

11111010001010101010

01010100100010100011

01010101000101010100

10101001100001111.................

Instruction manual

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Summary of Contents for ITI TRAWL SYSTEM

Page 1: ...rial data communication and NMEA 0183 message description 11111010001010101010 01010100100010100011 01010101000101010100 10101001100001111 Instruction manual All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ...All manuals and user guides at all guides com ...

Page 3: ...Simrad ITI Trawl system Serial data communication and NMEA 0183 message description Instruction manual 857 164777 Rev A All manuals and user guides at all guides com ...

Page 4: ...ility for damage or injury caused by improper installation use or maintenance of the equipment Copyright E 2003 Simrad AS ISBN 82 8066 013 5 The information contained within this document remains the sole property of Simrad AS No part of this document may be copied or reproduced in any form or by any means and the information contained within is not to be communicated to a third party without the ...

Page 5: ...ystem 1 INTRODUCTION 2 ITI TRAWL SYSTEM BASIC PRINCIPLE 3 ITI GEOMETRY FOR TWIN RIG 4 RESPONSIBILITY 5 SERIAL LINES 6 NMEA 0183 MESSAGES DEFINITIONS 7 NMEA ABBREVIATIONS ITI AUX MENU SELECTIONS Cd6911 M S simrad Echo our research and demonstration vessel All manuals and user guides at all guides com ...

Page 6: ...Remarks References Further information about the ITI system suppliedmay befound inthe followingmanuals ITI Installation manual ITI Trawl Eye Instruction manual All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 7: ...INES 6 Transmitted messages 6 Received message 8 Serial line configuration and pin allocations 9 Serial port pin assignments 10 6 NMEA 0183 MESSAGES DEFINITIONS 11 Message description 11 NMEA output from ITI 12 NMEA Input to ITI 23 Telegram from Winch Syncro 2020 25 7 NMEA ABBREVIATIONS ITI AUX MENU SELECTIONS 26 All manuals and user guides at all guides com ...

Page 8: ...tic database Rev Comments A Original issue B C D To assist usin making improvementstothe productand tothismanual we wouldwelcome comments and constructive criticism Please send all such in writing or by e mail to Simrad AS Documentation Department P O Box 111 N 3191 Horten Norway or e mail simrad documentation simrad com All manuals and user guides at all guides com ...

Page 9: ...edintheITIsystem The most common way of connecting electronic equipment is to use serial lines Amore powerful way of integrating is the Ethernet standard with higher signalling capacity The softwarerequired tocommunicate overthe Ethernetisincludedin theITI system however astandard ITI does not include the hardware required A dedicated interface display board containing the Ethernet hardware must b...

Page 10: ...awl It also provides all crucial information for an effective profitable and responsible fishing The ITI is a modular system From a basic unit of one sensor the ITI system can be extended to a complete and advanced instrument package according to the customers requirements Distance and Speed sensor Trawl Eye Depth and Temperature Sensor Catch Sensor Simrad sphilosophyisto reduceintegration costsan...

Page 11: ...nts of the distance from the vessel to both trawl doors and to the clump In addition the distances between each door and the clump are measured based on transponders attached to the clump Based on these range measurements the geometry of the Twin Rig is calculated with high accuracy since all measurementsare relative to each other 1 3 30 28 310 307 309 Cd6891 Theclumppositionrelativetoastraightlin...

Page 12: ...ights are 3 2 meter and the Trawl Eye echogram shows that the port trawl has good bottom contact but for the moment with a few fishes in the opening One Catch Sensor is mounted on the port cod end The trawl is 6 20 min behind the vessel the clump hasa light bottom contact ascending 0 4 m min Depth below the vessel is 120 meter and the temperature at the trawl is 5 8_ C In addition heading speed an...

Page 13: ...ddisplayalgorithm usedby Simradfor displaying the data on a CRT might not be the optimum for applications which are using the data as part of input parameters for controlling or regulating winches etc Simrad will therefore emphasise to any one who are using the ITI data to design an application specific filtering and adding artificial intelligence to the use of and interpreting the data received W...

Page 14: ...wl position GLL to an auxiliary plotter Port A B and Chave two waycommunication whileport Donly hasinput data All four serial lines can receive telegrams without being activated from the menu Ports A B and C must be activated from the menu before any messages being transmitted Transmitted messages A NMEA telegram will be transmitted when its data has been updated Each individual parameter availabl...

Page 15: ... IIHB2 IITDS IITS2 IIHFB IIMTW IITFI IITPT IIGLL IIDAD IIHB2 IITPC Table 1 Transmitted messages Table 1 shows the different parameters that can be transmitted by ITI when activated in the menu In addition all messagesreceived on serial line B can be transferred out on Ethernet This transfer facility is activated from the command NMEA TRANSFER Optionally IIGLL trawl position is available on Port C ...

Page 16: ...be transmitted out on serial port B and vice versa means any character will be accepted Serial line D Navigator Serial line A Echosounder Serial line B Aux Serial line C Sonar Ethernet Aux GLL VTG ZDA SDDBS DBT GLL VTG SDDBS DBT HDT HDM HDG ZDA SSTPP TAWWL TAWWT WMSYN HDT HDM HDG SSTPP GLL VTG SDDBS DBT HDT HDM HDG ZDA SSTPP TAWWL TAWWT WMSYN Table 2 Received messages All manuals and user guides a...

Page 17: ...Port D can be configured as RS 232 RS 422 or current loop Table 3 givesan overviewof the different waysof configuring the serial lines electrically and the dedicated use of each line Port Possible configurations ITI port allocation Format A RS 232 Echo sounder NMEA 0183 B RS 422 Winch control Track plotter Data logger NMEA 0183 C RS 232 Sonar NMEA 0183 D RS 232 RS 422 20 mA Current loop Navigator ...

Page 18: ...ver cabinet Pin Name Description 1 2 3 4 5 6 7 8 9 RX DA2 TX DA2 GND RT SA2 CT SA2 Receive data RS 232 NMEA RX A Transmit data RS 232 NMEA TX A Signal ground RS 232 NMEA RX TX B Request to send RS 232 Clear to send RS 232 Table 4 Pin assignments ports B and C Note The RS 232 inputs of port A D do not meet the optoisolation requirements of the NMEA standard and precautions should be taken thereafte...

Page 19: ...threelettersindicatethetypeofmessage Thetelegram may consist of many data fields separated by commas A field may be empty and then only the separating commas are transmitted also called nullfields Each message endswith cr Carriage Return and lf Line Feed For all message starting with the checksum hh is included in compliance with version 2 20 of the NMEA 0183 standard no checksum on sentences Thro...

Page 20: ...s the year xx xx isthe local time zone hh mm positive offseteast ofGreenwich IITPT xxxx M y P zzzz z M cr lf Trawl Position True vessel TPT represents the True Trawl Position relative to the vessel xxxx M is the horizontal range in metres to the target 0 4000 m requires an active depth sensor on the trawl or manual set depth if not the slant range will be presented yyy P Is the true bearing to the...

Page 21: ...is normally positive requires an active depth sensor on the trawl or manual set depth if not the depth field will be empty IIGLL ddmm hhh N dddmm hhh W hhmmss ss A hh cr lf Trawl Position in Latitude and Longitude GLL represents the trawls Geographical Latitude and Longitude requires GLL input from a nav Receiver ddmm hhh N is the Latitude Deg Min Hundredths N North S South dddmm hhh W is the long...

Page 22: ... from headrope to bottom 0 100 m IIHB2 x x M y y M cr lf Trawl Headrope to Footrope and Bottom Height sensor 2 HB2 represents the distances from the Headrope to the Footrope and Bottom x x M is the distance in metres from headrope to footrope 0 100 m y y M is the distance in metres from headrope to bottom 0 100 m IITDS x x M cr lf Trawl Door Spread 1 TDS represents the Trawl Door Spread 1 distance...

Page 23: ... y xx y xx y a x x M Gx gx Vx x hh cr lf Trawl Eye Echo telegram fish detection TE carries the echo readings from fish detection and the sensor set up parameters type of trawl range gain etc x x per cent of samples above threshold for the 10 echo cells y average level 1 7 of the xx Data skipped if cell is empty or not available a B P Bottom Pelagic 10 cells b p bottom pelagic 5 cells x x M total r...

Page 24: ...e transmitted filtered values if sensorfilter is on hhmmss time of transmission time of Spread interrogation requires ZDA input from GPS for accurate timestam PSIMHn xxxx M xxxx M yyy y T zz z M zz z M hhmmss hh CR LF n n 1 height 1 sensor or trawl eye n 2 height 2 sensor xxxx M Slant range in meters to sensor filtered values decimals not used xxxx M horizontal range in metres to sensor unfiltered...

Page 25: ...values nullfields will be transmitted PSIMCA xxxx M xxxx M yyy y T x y z hhmmss hh CR LF CA catch sensor bearing and range only to activated sensor with lowest number xxxx M slant range in metres to sensor filtered values decimals not used xxxx M horizontal range in metres to sensor unfiltered values nullfields if depth sensor not activated will calculate horizontal range with manual set depth dec...

Page 26: ...hmmss hh CR LF TM temperature sensor xxxx M slant range in metres to sensor filtered values decimals not used xxxx M horizontal range in metres to sensor unfiltered values nullfields if depthsensor not activated will calculate horizontal range with manual set depth decimals not used yyy y T true bearing deg rel north to sensor requires gyro input for reliable data zz z C water temperature in 5 to ...

Page 27: ...p About the mid weight filter the mwfilter calculatesfrom unfiltered horizontal rangesfor mw filter setting of 1 to 5 and if active depth sensor on trawl the mw filter calculates from filtered horizontal ranges for mw filter setting of 6 to 10 and active depth sensor on trawl the mwfilter calculatesfrom filtered slant rangesif no active depth sensor on trawl y y D starboard angle between true GPS ...

Page 28: ... thedirectionofthevessel scentreline Thevaluewillbepositive if the shoal is ahead of the trawl negative if the shoal is behind the trawl z M isthe vertical distance in metresfrom the trawl to the shoal The value will be positive if the trawl is above the shoal negative if the trawl is below the shoal The sign will be shown only if the value is negative Note This sentence requires the SSTPP sentenc...

Page 29: ... sentence requires an active depth sensor on the trawl IIZDL hhmmss ss x x a hh cr lf Time and Distance to Variable Point The point is here the position sensor on the trawl which normally is the mid weight sensor on double trawl hhmmss ss Time to point 00 to 99 hours minutes and seconds x x distance to point in nautical miles a type of point C Collision T Turning point R Reference general used by ...

Page 30: ... 5A IITS2 118 9 M PSIMS2 3021 M 2998 M 172 6 T 118 9 M 062218 55 IITFI 1 1 0 IIDAD 0375 6 M 001 9 M IIMTW 03 5 C 15 PSIMMW 3018 3 M 2996 3 M 174 9 T 0000 8 M A 062220 7C SDDBS 0187 5 M 1A IIDBS 0375 6 M 01 PSIMTE 29 4 60 3 98 7 97 7 97 6 97 4 97 2 46 1 B 8 0 M G1 g7 V3 08 52 PSIMH1 1557 M 1512 M 189 9 T 008 1 M 015 0 M 143842 25 PSIMH2 1557 M 1512 M 189 9 T 007 0 M 015 0 M 143843 29 PSIMS1 1556 M ...

Page 31: ...lar co ordinates x M is the horizontal range in metres to the target y P is the bearing to the target relative to the vessel s heading requires gyro input on both Sonar and ITI for reliable data z M is the target s depth in metres below the surface nn isthe target identification code 0 means echo target tracked 10 means position tracked GLL ddmm hh N dddmm hh W hh cr lf Geographical position is th...

Page 32: ... to the port trawl door resolution 1 m TAWWT x x T y y T cr lf Winch Wire Tension TA is the identification code WWT represents Winch Wire Tension x x T is the starboard wire tension resolution 0 1 ton y y T is the port wire tension resolution 0 1 ton ZDA hhmmss ss dd MM yyyy xx xx hh cr lf Time Date hh is the hours mm is the minutes ss is the seconds and parts of seconds dd is the day s date MM is...

Page 33: ...ed NMEA0183 sentence its format complies with most of the NMEA rules WMSYN xxx x c xxx x c xxx x c xx x T xx x T xx x T hh cr lf Sentence identifier Starboard Wire Length Mid Wire Length Port Wire Length m meter F Fathom f feet Starboard Wire Tension tons Mid Wire Tension tons Port Wire Tension tons Cd6887 Note The ITI will not present the mid wire tension and mid wire length References National M...

Page 34: ...IMTH Distance trawl headrope to footrope and bottom Trawl Eye Height Sensor 1 IIHB2 Height 2 IITDS IITS2 Trawl door spread Sensor1 and Sensor2 PSIMS1 PSIMS2 Range bearing and distance Spread 1 and Spread 2 IITFI Trawl filling IITPC Trawl position in Cartesian coordinates IITTS Trawl to shoal distance IIVTG Vessel course over ground and speed IIDBS Depth of trawl below surface IIDAD Depth Ascend De...

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