Tritech Micron Modem, Product Manual

Page 1: ...Micron Modem 0630 SOM 00001 Issue 03 1 Tritech International Ltd Micron Modem Product Manual 0630 SOM 00001 Issue 03 ...

Page 2: ...plied by Tritech International Ltd on the understanding that it may not be copied used or disclosed to others except as authorised in writing by Tritech International Ltd Tritech International Ltd reserves the right to change modify and update designs and specifications as part of their ongoing product development programme All product names are trademarks of their respective companies ...

Page 3: ...Communication Protocol 10 3 5 Configuration 10 4 Operation 12 4 1 Software 12 4 2 Integration Considerations 12 4 3 Transmission Characteristics 13 5 Configuration 14 5 1 Enabling Setup Mode 14 5 2 Modem Configuration Window 15 6 Maintenance 17 A Changing Modem Modes Responder Transponder Modem 18 A 1 Changing Modes using a Magnet 18 A 1 1 Setting up the Software 18 A 1 2 Conversion to Transponder...

Page 4: ...are revision numbers 3 A clear fault description 4 Details of any remedial action implemented Contamination If the product has been used in a contaminated or hazardous environment you must de contaminate the product and report any hazards prior to returning the unit for repair Under no circumstances should a product be returned that is contaminated with radioactive material The name of the organis...

Page 5: ...t topic Important When this is shown there is potential to cause harm to the device due to static discharge The components should not be handled without appropriate protection to prevent such a discharge occurring Caution This highlights areas where extra care is needed to ensure that certain delicate components are not damaged Warning DANGER OF INJURY TO SELF OR OTHERS Where this symbol is presen...

Page 6: ...it via the direct path and via a series of secondary paths due to reflections from the sea surface and sea bottom This can often result in the loss or corruption of transmitted data In addition conventional systems have poor immunity to the continuously varying background sea noise such as wave noise Tritech Spread Spectrum technology does not concentrate the acoustic energy in one waveband but pr...

Page 7: ...l Transmitter source 169dB re 1μPa at 1m Doppler tolerance 5m s 1 Minimum signal to noise ratio 6dB in band Multipath rejection Maximum delay spread of 10 100ms Ranging Integral range function with 0 1m resolution over full range and 0 2m accuracy assuming correct velocity of sound 2 3 Electrical and Communication Communications protocol RS232 or RS485 Power supply 12 48V DC Power consumption 7 92...

Page 8: ...is not wet mateable and direct exposure to water when the unit is powered will cause damage 1 2 6 4 3 5 Face View Connector Pin Wire Colour Function 1 Yellow RS485 A RS232 TX 2 Blue RS485 B RS232 RX 3 Red DC 4 Black DC ground 5 Green RS232 ground 6 cable sheath earth Caution Applying power to the communication lines will cause significant damage the unit Note The Micron connector should be tighten...

Page 9: ... dimensions are in mm not to scale 50 00 Dia 24 00 24 00 THREAD M3x0 5 DEPTH 4 50 Figure 3 1 Mounting Holes on Micron Range 3 2 Handling The Micron Data Modem is a sealed product and should not be opened or tampered with in any way There are no user serviceable parts or internal switches which would necessitate disassembly The connector socket is not usable open face and should always be sealed wi...

Page 10: ...RS485 RS485 RS232 RS485 RS485 RS232 RS232 RS232 MODEM 750m 07619 XXXXXX Note If the settings are changed through software it is important to keep a record of the changes otherwise it can be difficult to re connect to the modem The RS232 telemetry is bi directional 3 wire TX RX and ground between the data modem and the controlling serial port The RS485 telemetry is half duplex 2 wire RS485 and RS48...

Page 11: ...a non standard mode of operation SU The unit has been configured as a Surface Modem SS The unit has been configured as a Subsea Modem RS The unit has been configured as a Responder for use with the MicronNav system It will not be usable as a modem XP The unit has been configured as a Transponder for use with the MicronNav system It will not be usable as a modem MODEM 750m 07619 XXXXXX ...

Page 12: ...Data Modem is configured to communicate on RS232 at 9600Bd 8 data bits 1 stop bit and no parity by default Other rate options are possible although the device is not configurable once in the field If the settings of a particular device are unknown contact Tritech International Ltd Technical Support providing the serial number and any of the original purchase details if known 4 2 Integration Consid...

Page 13: ... a master modem only with a master modem capable of broadcasting data to all slave modems within operational range Data control is not provided by the Micron Data Modem For instance simultaneous transmissions from both modems in a pair may not result in transmission receipt by either modem Control of the Micron Modem must be handled by the connected computer or hardware Error checking and data qua...

Page 14: ...splayed make sure that the device Aif is enabled and using the correct COM port that is connected to the Micron Modem the Status column should read Not Available until the Micron Modem is turned on Figure 5 1 Channel Setup within Utilities Power on the modem while holding a magnet to the side of the housing as indicated in Figure 5 2 Location of Reset Switch activated by magnet Figure 5 2 Location...

Page 15: ...em Configuration The AM100ModemCfgSetup dialog allows the following settings to be changed Unit OpMode Select Surface Modem or SubSea Modem Transponder and Responder are not applicable to the Micron Data Modem COM Rx TMO Enabled This option should always be selected to prevent data loss Test Msg stm When selected on receipt of an stm LF string the receiving modem responds with the message Hello Th...

Page 16: ...eed 57600 setting in Async 0 Serial LAN AUX 1 section must not be altered the magnetic reset does not reset the baud rates This button will load the Comms Setup dialog The only field that should be altered is indicated in Figure 5 5 Comms Setup Dialog Figure 5 5 Comms Setup Dialog To change the setting 1 Select the required baud rate from the list in the field indicated in Figure 5 5 Comms Setup D...

Page 17: ...rature range it is best to avoid temperature extremes for long periods and protect the device from bright sunlight It is recommended that usage logs are maintained and that the heads are returned to the vendor at 4000 hour intervals for routine inspection and replacement of o ring seals Any cables that are supplied with the Micron Modem are high quality with low halogen jackets and should provide ...

Page 18: ...is appendix A 1 Changing Modes using a Magnet A 1 1 Setting up the Software Connect the MicronNav100 Hub to the USBL Transducer head and computer and ensure the communications link to the Transponder Responder is disconnected from Port B on the MicronNav100 Hub Connect power to the MicronNav100 Hub and switch it on On the computer navigate to C Program Files Seanet and create a shortcut to Seanet ...

Page 19: ...the settings and close the SeaHub Setup page After a few seconds the reprogramming of the unit will be complete and Node 90 Prog Cfg Done will be displayed in the status box The SEAHUBNAV100 table entry will temporarily disappear from the list while the unit resets to activate the change Configure the baud rate of Port B by selecting Com Setup from the Utilities menu Open the Channel Setup page cl...

Page 20: ... B of the MicronNav100 Hub Position a magnet against the body of the unit as shown below and re apply power to the system After a few seconds the unit should be visible in the Seanet Setup window and displayed as MINIMODEM If not try repositioning the magnet slightly and power cycling again The system is now ready for the conversion to take place and detailed steps are explained in the following 2...

Page 21: ...he status bar The magnet can now be removed from the body of the Responder unit and power switched off and re applied to activate the change This now completes the conversion from Responder to Transponder mode Close the Seanet Setup program and delete the Seanet Pro Supervisor shortcut A 1 3 Conversion to Responder The Transponder unit can be reconfigured to Responder mode by clicking on the Actio...

Page 22: ...econds the reprogramming of the unit will be complete and Node 85 Prog Cfg Done will be displayed in the status bar The magnet can now be removed from the body of the Transponder unit and power switched off and re applied to activate the change This now completes the conversion from Transponder to Responder mode Close the Seanet Setup program and delete the Seanet Pro Supervisor shortcut ...

Page 23: ... buffer will automatically be flushed guaranteeing that RS232 commands will be accepted Alternatively this can be managed by keeping tight control over how many characters are sent to the unit and making sure that it is a multiple of four before issuing an RS232 command The Micron Modems will fill out unused characters with NULL characters after the two seconds timeout and transmit four characters...

Page 24: ...ansducer on each modem If the modems are too far apart in air then corruption of the ASCII message will occur or no data will be received by the second modem HyperTerminal 1 Open HyperTerminal if this is installed it will be located in the Windows Start Menu 2 Enter the name for the Terminal window and then click OK 3 Next select the COM port number of the port that the first modem is connected to...

Page 25: ...hen click on the File drop down menu and select Properties Click on the Settings tab at the top of the window and click the ASCII Setup button 6 Ensure that the Send line ends with line feeds and Echo typed characters locally options are checked and click OK to apply the settings and then click OK on the properties dialog 7 Repeat steps 1 6 to create another terminal window for the second modem ...

Page 26: ...Slave modem configuration multiple Slave modems can be connected and tested in HyperTerminal with one Master modem The Master modem ASCII message is broadcast to all Slave modems in range and each Slave modem message is only received by the Master modem Docklight Note The version in use here is Docklight V1 9 Docklight is available from www docklight de 1 Within the Send Sequences box double click...

Page 27: ...ee function commands entered 3 The COM port that the Micron Data Modem is attached to needs to be configured Double click on the COM port number in the top right hand corner of the main window which will open the Project Settings dialog Within this dialog select the appropriate COM port for the modem to be used Ensure the baud rate is set to match the modem 9600 by default and that the Send Receiv...

Page 28: ... Issue 03 28 Tritech International Ltd the appropriate command response is received Then the COM port that the Slave is connected to should be selected and the commands sent again This will check that both modems can send and receive commands An example output is shown ...

Page 29: ...ar Pulse a technology for improving image resolution initially used in radar systems but also adapted to sonar devices DC Direct Current RS232 Traditional name for a series of standards for serial binary data control signals RS485 A standard for defining the electrical characteristics of drivers and receivers for use in a balanced digital multipoint system also known as EIA 485 RX Receive data TX ...