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Section 5 Sensor Communication

34

FT205EV Wind Sensors

– User Manual

5.3 UART Protocol

UART is typically used over short transmission distances (typically 0-600mm) and can only support one master
(controller) and 1 slave (wind sensor) device.

Figure 25: UART Connection Diagram

Notes:

1. 3/5V TTL compatible

5.4 Configuring the Sensor

All user parameter settings are stored in non-volatile memory and are retained when the sensor is switched off.
When the sensor is next switched on (or a user reset command is sent) the sensor will revert to these settings.
The sensor can therefore be configured prior to final installation if required.

The sensor settings can be returned to the factory values (see Figure 30 for factory default settings) at any time
by sending the factory reset command.

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Содержание FT205EV

Страница 1: ...OUSE BROOKLANDS CLOSE SUNBURY ON THAMES MIDDLESEX TW16 7DX UNITED KINGDOM TEL 44 0 20 8943 0801 FAX 44 0 20 8943 3283 WEB www fttechnologies com E MAIL info fttechnologies com FT205EV Digital Wind Sen...

Страница 2: ...Selective Filter Scheme 10 2 7 Error Detection 11 2 8 Overspeed Warning Scheme 11 2 9 Acoustic Temperature 11 3 MECHANICAL ELECTRICAL INSTALLATION 12 3 1 FT205EV Sensors 12 3 1 1 Mechanical Electrica...

Страница 3: ...1 6 4 9 DF Set or Query the Wind Velocity Data Format 52 6 4 10 DG Query the Run time Counter 54 6 4 11 DL Set or Query the Command Delay Interval 55 6 4 12 ER Query or Reset the Error Report 56 6 4 1...

Страница 4: ...by returning the product to FT Technologies or by using an appropriate waste disposal company This product should not be disposed of in general waste of landfill This product complies with the RoHS2...

Страница 5: ...sure that the product remains compliant with electrical safety requirements it should be o Connected to an appropriately approved isolated power supply rated 6 30VDC and be current limited 0 2A Maximu...

Страница 6: ...hly resistant to interference from vehicle systems During development the sensor has been HALT highly accelerated life test tested up to 60G demonstrating its operational strength The FT205EV allows c...

Страница 7: ...ign application The Purchaser should independently undertake sufficient testing to confirm validity and suitability of any design The Purchaser assumes all risks and liability in conjunction with the...

Страница 8: ...rface options RS422 full duplex RS485 half duplex Buffered UART full duplex 3V 5V TTL compatible Format ASCII Polled or Continuous Update Polar and NMEA 0183 Data Update Rate Up to 10 measurements per...

Страница 9: ...maintained in non volatile memory When enabled the uncorrected wind speed output is adjusted according to the stored User Calibration Table records using linear interpolation The adjustments are appli...

Страница 10: ...ormed with the FT205EV mounted in its final position within the host system The calibration can only compensate for fixed magnetic fields generated by the host system Varying fields caused for example...

Страница 11: ...cts wind speed beyond the rating of the sensor the sensor will by default indicate a general error flag status An additional overspeed warning scheme can be enabled if an overspeed condition is detect...

Страница 12: ...lacement due to the spinning rotors Note the length of the M3 screws will be dependent on the thickness of the integrated system mount Ensure the airflow into the sensor is not obstructed or influence...

Страница 13: ...Section 3 Mechanical Electrical Installation 13 FT205EV Wind Sensors User Manual Figure 4 FT205EV Sensor General Sensor Views units in mm...

Страница 14: ...Mechanical Electrical Installation 14 FT205EV Wind Sensors User Manual Figure 5 FT205EV Sensor M3 Thread Details Caution Excessive length or tightening of the M3 screw may cause damage to the sensor a...

Страница 15: ...3 Mechanical Electrical Installation 15 FT205EV Wind Sensors User Manual Figure 6 FT205EV Surface Mount Option Caution Excessive length or tightening of the M3 screw may cause damage to the sensor and...

Страница 16: ...Section 3 Mechanical Electrical Installation 16 FT205EV Wind Sensors User Manual Figure 7 FT205EV Pipe Mounted Option...

Страница 17: ...epends on user requirements the FT recommended material is carbon fibre due to its low weight and high rigidity Warning The user should review all aspects of the pipe material and bonding adhesive str...

Страница 18: ...ctor on both cable ends and corresponding pin numbering The connector is keyed and can only be inserted in the correct orientation not to scale Pin RS422 full duplex RS485 half duplex Buffered UART fu...

Страница 19: ...abling with appropriate surge and EMI protection All connections from the wind sensor to any data acquisition equipment and power supply should run through suitable Surge Protection Devices SPD This w...

Страница 20: ...d be removed using an abrasive cloth Check that any seals and fasteners are in good condition and tighten as necessary If corrosion is present replace with parts of an appropriate finish see Section 3...

Страница 21: ...dated During extreme weather conditions there may be periods where data is temporarily unavailable However there are ways to mitigate against these affects The following steps should be taken to ensur...

Страница 22: ...nnection See Figure 11 Figure 11 The FT062 Power Supply left Benchtop Electronic PSU Example right The Acu Test kit allows the user to view and modify configuration settings The Acu Test cable is not...

Страница 23: ...to the relevant parts Connect the 24VDC terminal of the power supply to the white wire red test plug and 0V terminal to the brown wire black test plug Connect the USB to a spare USB PC socket and remo...

Страница 24: ...place with the required cable In case of technical issues please contact the technical support team at FT Technologies 4 4 2 Acu Vis 2 0 Software Operation Acu Vis 2 0 opens on the Connect display win...

Страница 25: ...lay includes sensor settings real time wind speed and direction data The temperature gauge on the right hand side shows the Internal Temperature and the Acoustic Temperature ambient air reading Note A...

Страница 26: ...the sensor Figure 18 Acu Vis 2 0 Settings Display The Sensor Warnings and History button will provide a history of the connected sensor settings where it has been connected to the PC The Export Senso...

Страница 27: ...dow shows the command structure and allows the user to transmit commands using the Execute Command button If the command has a response it will be shown below Some SET commands require the user to add...

Страница 28: ...u Vis 2 0 will download any existing UCT settings and display them on the table and graph The easiest method of changing the UCT is to use the Standard Offset buttons to establish a calibration change...

Страница 29: ...tion in the File Menu Figure 21 Creating a Connection in Tera Term Create a new Serial connection the COMx channel will be dynamically assigned by the user s computer but should typically be recognise...

Страница 30: ...may be necessary to repeat the command and confirm it was accepted using a QUERY command This can be an issue when using CU mode at high frequencies Below are some useful commands 01 ID Query the sens...

Страница 31: ...rate limited drivers are used to reduce EMI and minimize reflections from improperly terminated transmission lines and stubs The signal state definitions for the serial interface data lines are as fo...

Страница 32: ...gram for 2 Wind Sensors Notes 1 Data lines A B should be twisted pair type characteristic impedance 120 The cable should incorporate overall screening braid which should be connected to the chassis at...

Страница 33: ...se of a fail safe RS422 transceiver 4 Subject to testing one or both termination resistors may be omitted only if biasing is not needed and the transceivers are slew rate limited 5 Resistors should be...

Страница 34: ...ompatible 5 4 Configuring the Sensor All user parameter settings are stored in non volatile memory and are retained when the sensor is switched off When the sensor is next switched on or a user reset...

Страница 35: ...2F Talker listener address field characters c A to Z 0 to 9 41 5A 30 39 Fixed length field of alpha upper case only and numeric characters h A to F 0 to 9 30 39 41 46 2F Checksum field validation cha...

Страница 36: ...or 0D 0A HEX 2 chararcter checksum Checksum delimiter 2A HEX See text for details of valid commands and output data strings Field delimiter 2C HEX optional for host commands 2 character identifier fie...

Страница 37: ...ker ID use the ID Command Section 6 4 17 5 5 5 Calculating the Message Checksum All messages sent to or received from the sensor include a checksum field Messages that are transmitted from the sensor...

Страница 38: ...tically enabled 02DFP 50 cr lf Without a checksum sensor checksum validation automatically disabled 02DFP cr lf A checksum value is always transmitted by the sensor with every outgoing message However...

Страница 39: ...Clear Error Report ER Reset 000000000000 6 4 12 Wind velocity filter FL Enabled or Disabled Speed filter length Direction filter length Enabled 0016 0016 6 4 13 6 4 14 Selective Filter FL Enable or D...

Страница 40: ...r Combined 6 4 9 Runtime Counter DG Number of hours of runtime 6 4 10 Command delay interval DL 00 to 20 6 4 11 Error report ER Factory Report 6 4 12 Wind velocity filter FL Enabled or Disabled Speed...

Страница 41: ...le with data the following steps need to be taken 1 The Table must first be cleared See Section 6 4 24 2 Each pair of table row values is entered into a RAM copy of the User Calibration Table See Sect...

Страница 42: ...predefined delay before sending a response This delay time is programmable in increments of 50ms See Section 6 4 11 for details of how the delay between the sensor receiving a command and transmittin...

Страница 43: ...ensor output talkerID AM orientation checksum cr lf aa AM x hh cr lf Parameters orientation N I Set Normal orientation for mounting the sensor in regular orientation Set Inverted orientation for mount...

Страница 44: ...temperature reading A valid reading in Kelvin is being acquired Message Comment 01 AT cr lf Query acoustic temperature WI AT 297 2 K V 0C cr lf Sensor response Example 3 CU AT DFC Mode WI WVC 000 0 33...

Страница 45: ...erature is to be output in degrees Celsius F The acoustic temperature is to be output in degrees Fahrenheit K The acoustic temperature is to be output in Kelvin Examples Example 1 Set the Acoustic Tem...

Страница 46: ...o 50S then one minute increments from 01M to 10M Factory Default Setting 01M Examples Example 1 Set the filter time constant to 40 seconds Verify that the command has been accepted Message Comment 01...

Страница 47: ...Examples Example 1 Set the baud rate to 19200 baud verify the new setting and send a user reset command to activate the new baud rate Message Comment 01 BR1 cr lf Set baud rate to 19200 01 BR cr lf Qu...

Страница 48: ...eastward declination angles are added to magnetic heading However since the declination angle on the FT205EV is provided in the form 0 to 359 9 the user must write westerly declination in the form 36...

Страница 49: ...results 01 CFC cr lf 01 CFE cr lf 01 CFMS cr lf Begin compass calibration Enable compass calibration Save the compass calibration Description Use the CF command to access the compass related features...

Страница 50: ...The UART Interface is enabled RS422 tx mode A The RS422 transmitter is always enabled I The RS422 transmitter is disabled when not transmitting Examples Example 1 Enable the RS485 interface Verify tha...

Страница 51: ...4 9 Enable CU mode 1Hz CU DFC Response 1Hz Description Use the CU command to enable or disable the continuous update mode of operation When continuous update is enabled the sensor will output wind vel...

Страница 52: ...e Examples Example 1 Set the wind velocity output data format to NMEA with wind speed in m s and verify the new setting Message Comment 01 DFN cr lf Set format to NMEA m s 01 DF cr lf Query format set...

Страница 53: ...ommand is sent to the sensor a reset of the minimum and maximum readings to their default values is automatically performed Polar Format The sensor returns the magnitude of the wind speed m s only and...

Страница 54: ...000000 to 999999 Holds the number of hours that the anemometer has been in operation during its lifetime Examples Example 1 Query the Run Time Counter Message Comment 01 DG T cr lf Query Run Time Cou...

Страница 55: ...the new setting Message Comment 01 DL05 cr lf Set delay to 250ms 01 DL cr lf Query delay setting WI DL 05 02 cr lf Sensor response Description Use the DL command to set the delay interval from when th...

Страница 56: ...ng is always comprised of 15 ASCII characters all shown as 0 ASCII 30 HEX in the above example The first character in the data field represents the current operational status of the sensor 0 ASCII 30...

Страница 57: ...Filter enabled Factory Default Setting D Filter disabled Examples Example 1 Enable the filter Verify that the command has been accepted Message Comment 01 FLE cr lf Enable filtering 01 FL cr lf Query...

Страница 58: ...t to disabling the filter Factory Default Setting 0016 Examples Example 3 Modify the filter s dimensions Verify that the command has been accepted Message Comment 01 FLL0001 0032 cr lf Set speed filte...

Страница 59: ...uery the Selective Filter status WI FL E 005 hh cr lf Sensor reports it is enabled with a 5 reading 0 5 second filter Example 2 Enable or Disable the Selective Filter Status 01 FLSE010 cr lf Enable th...

Страница 60: ...ment 01 HT cr lf Query heater setting WI HT 99 00 24 3B cr lf Sensor Response 24 C Description The HT query command requests the status of the internal heater circuit Since no heater functionality is...

Страница 61: ...Factory Default RxID 01 TxID 00 to ZZ The sensor 2 digit talker address identifier Factory Default TxID WI Examples Example 1 Set the sensor listener address identifier to A1 and the talker address i...

Страница 62: ...to 999 9 and MaxSpeed to 000 0 until the first reading MinSpeed 000 0 to 999 9 Minimum detected wind speed in current unit m s knots or km h MaxSpeed 000 0 to 999 9 Maximum detected wind speed in curr...

Страница 63: ...led E Overspeed Warning Enabled Examples Example 1 Enable the Overspeed Warning scheme Verify that the command has been accepted Message Comment 01 OSE cr lf Enable the scheme 01 OS cr lf Query Oversp...

Страница 64: ...e sensor reloading the last parameter settings Message Comment 01 RSU cr lf Reset sensor reloading last settings Description Use the RS command to reset the sensor software The sensor will be ready to...

Страница 65: ...tformVersion 00 99 Platform version issue of the sensor design The 3 spaces after the 2 digit number are reserved for future use Examples Example 1 Read the sensor serial number and platform version M...

Страница 66: ...to 9 9 9 Software version of the sensor Examples Example 1 Read the software version number Message Comment 01 SV cr lf Query software version WI SV 7 5 06 cr lf WI SV 7 5 1 19 cr lf Sensor response...

Страница 67: ...user calibration table status WI UC 55 E 5174 5174 70 cr lf Typical sensor response Description Use the UC command to enable or disable the implementation of the user calibration table for calibrating...

Страница 68: ...ple 1 Erase the user calibration tables and verify Message Comment 01 UCCLEAR 62 cr lf Erase calibration tables 01 UC 04 cr lf Query user calibration table status WI UC 00 D 0000 0000 71 cr lf Sensor...

Страница 69: ...than 0 5ms than previous record Error Data entry not allowed table has not been cleared first Error Bad argument data format not valid Error User calibration table is full all 64 rows have been entere...

Страница 70: ...68 cr lf Save calibration table 01 UC 04 cr lf Query user calibration table status WI UC 55 E 5174 5174 70 cr lf Typical sensor response Example 2 Read calibration data stored in row 5 of the Flash ca...

Страница 71: ...l32 xxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxx 32 ASCII characters Note ASCII spaces will be added to entered ASCII string if it is less than 32 characters to form a string of 32 characters Examples Example 1...

Страница 72: ...Examples Example 1 Set and Verify new user saved parameters Message Comment 01 USS cr lf Set saved parameters 01 US cr lf Query the saved parameters WI US F 4F cr lf Sensor response Description There...

Страница 73: ...ser Parameters See command RSS Section 6 4 20 for the details of the RSS command After RSS commands are executed the restored parameters are loaded into RAM so it is imperative to execute any one of t...

Страница 74: ...X If the sensor detects an error condition the status character will be set to 1 If the Overspeed Warning Scheme see Section 2 8 is enabled and if the sensor detects wind speed above the maximum range...

Страница 75: ...r returns the magnitude of the wind speed m s and the wind direction 0 359 NMEA 0183 Format The sensor returns the NMEA 0183 Wind Speed and Angle sentence MWV see WV NMEA Section 6 4 30 It is importan...

Страница 76: ...tes the NMEA wind velocity data format The example shows the sensor output in m s with a wind speed of 20m s and a wind angle of 45 Message Comment 01 WV 13 cr lf Query the wind velocity WIMWV 045 R 0...

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