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Section 6

Parameter Settings

FT702LT Flat Front Wind Sensor Manual

6.4.14

MM: Reset or Query the Min/Max Recorded Wind Speed

Command
Parameter

Command
Syntax

SET Sensor:

$<listenerID>,MM<setting>*<checksum><cr><lf>
$aa,MMc*hh<cr><lf>

QUERY Sensor:

$<listenerID>,MM?*<checksum><cr><lf>
$aa,MM?*hh<cr><lf>

FT702LT output:

$<talkerID>,MM=<MinSpeed>,<MaxSpeed>*<checksum><cr>
<lf>
$aa,MM=xxx.x,xxx.x*hh<cr><lf>

Parameters

resets the min/max readings to their default (<MinSpeed> to 999.9
and <MaxSpeed> to 000.0) until the first reading

000.0 to 999.9

minimum detected wind speed in current unit (m/s, knots or km/h)

000.0 to 999.9

maximum detected wind speed in current unit (m/s, knots or km/h)

Examples

Example 1
Query the min/max wind speed readings
Message

Comment

$01,MM?*//<cr><lf>

Query the min/max readings

$WI,MM=005.1,034.2*22<cr><lf>

FT702LT response

Description

Use the MM command to query the minimum and maximum wind speed readings that the
FT702LT has recorded since it was last switched on. The minimum and maximum readings
are set to their default values when an MMR, an RS or a DF set command is executed.

Содержание FT702LT

Страница 1: ...2089 430 801 FAX 44 0 2089 433 283 WEB www fttechnologies com E MAIL info fttechnologies com A4206 4 EN JULY 2017 The FT and Acu Res logos are registered trademarks of FT Technologies Ltd FT702LT Win...

Страница 2: ...11 2 5 Error Detection 11 2 6 Heater Setup 11 3 INSTALLATION 12 3 1 Connectivity 12 3 2 Description of Parts 14 3 3 Lightning protection and EMC 16 3 4 Inspection of the FT702LT 21 3 5 Fault Finding T...

Страница 3: ...t should not be disposed of in general waste or landfill limination du produit Conform ment la directive europ enne 2012 19 EU relative aux d chets d quipements lectriques et lectroniques DEEE ces com...

Страница 4: ...andards the equipment must be o Connected to an appropriately approved isolated power supply for example UL CSA IEC 60950 1 2005 A1 2009 A2 2013 rated 20 30VDC and be current limited 6A Max o Protecte...

Страница 5: ...onnect une alimentation agr e convenablement isol e par exemple UL CSA IEC 60950 1 2005 A1 2009 A2 2013 de tension nominale 20 30 VCC et avec courant limit 6 A max o Prot g par des dispositifs de prot...

Страница 6: ...gns to a reference point For operation in ice prone areas the FT702LT is fitted with a highly effective thermostatically controlled all body heating system A three element heater one element located i...

Страница 7: ...tact FT Technologies for further information 1 4 Scope of Use The FT702LT is designed manufactured and optimised for high availability The FT702LT wind sensor often attains 99 9 or better availability...

Страница 8: ...given by FT Technologies in respect of the Equipment is conditional upon the sensor being handled installed integrated and operated in accordance within the guidelines given in this manual FT Technol...

Страница 9: ...e 5 measurements per second Power Requirements3 Supply Voltage 20V to 30V DC 24V DC nominal Supply Current Heater off 30mA Supply Current Heater on 6A max The heater is thermostatically controlled Hea...

Страница 10: ...applied to wind speed readings regardless of wind direction 2 3 Wind Speed and Direction Filtering It is important that the system does not rely exclusively on a single wind reading for any control d...

Страница 11: ...dual heater to maintain the programmed set point temperature It is important to consider the resistive losses in the cable and rate the cable appropriately In general power losses in the cable should...

Страница 12: ...scription Manufacturers Part Number FT Sensor Type Maximum Outer Cable Diameter Manufacturer FT702LT Cable Side Connector 5 way plug SE104Z053 130 8 7 FT702LT RS 485 Option 8 0mm W W Fischer FT702LT C...

Страница 13: ...it is possible to use the same 2 wire data link to connect all the FT702LT units to the computer Before using an FT702LT in a multi device system the Listener identifier of each FT702LT must be set to...

Страница 14: ...to the sensor s mounting flat whilst avoiding the fixing hole Use of an electrical joint compound will also help to maintain long term low impedance connection to ground This connection should be chec...

Страница 15: ...e 8 FT702LT FF with protective sleeve 3 2 1 Alignment The FT702LT measures the wind direction relative to the mounting flat and bar When the wind sensor is correctly aligned the wind direction measure...

Страница 16: ...he sensor so that its body can never be subjected to a direct lightning strike Figure 10 Direct lightning strike Figure 11 Indirect lightning strike This level of protection is achievable through the...

Страница 17: ...galvanised steel or aluminium in order to prevent corrosion This will ensure a long term low impedance connection to ground Figure 12 Ring and Rod interceptors The standards for Lightning Protection o...

Страница 18: ...on of the lightning current will flow in it An example of metal conduit could be HellermannTyton s HelaGuard steel conduit with plastic coating and steel overbraid All cable shielding must be continuo...

Страница 19: ...ignals enter the cabinet in order to prevent noise propagating to other electronics The SPDs should also be grounded appropriately Figure 14 shows how the SPDs should be installed Figure 14 FT702LT di...

Страница 20: ...Section 3 Installation 20 FT702LT Flat Front Wind Sensor Manual Figure 16 Example of wiring inside a Phoenix Contact control cabinet...

Страница 21: ...osion If corrosion is present on either surface it should be removed using an abrasive cloth Before reinstalling the sensor electrical joint compound should be applied to the sensor s mounting flat se...

Страница 22: ...are signs of physical damage and or the sensor is failing to communicate properly it should be replaced Sensors may be returned to FT Technologies for further analysis if required see section 3 6 War...

Страница 23: ...ing of the power leads could damage the equipment and is not covered by FT s standard warranty terms 4 2 Acu Vis Software The Acu Vis software automatically detects the FT054 cable and wind sensor The...

Страница 24: ...sing Acu Vis Figure 19 Evaluation Cable 4 4 Quick Start Steps 1 Insert the Acu Vis CD in to the PC and install Acu Vis by running the setup exe file Figure 20 Acu Vis Install Files 2 Remove the FT702L...

Страница 25: ...lation sequence 5 Once the above sequence is complete wait approximately 10 seconds and then run Acu Vis by selecting the shortcut icon on the desktop or from the start menu in the FT Technologies fol...

Страница 26: ...nd received messages are printed in italic courier monospace font e g listenerID DFP checksum cr lf Angle brackets are used as placeholders for data e g wind speed or for non printable ASCII character...

Страница 27: ...minator 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 identifie...

Страница 28: ...ker ID use the ID Command Section 6 4 13 5 3 5 Calculating the Message Checksum All messages sent to or received from the FT702LT include a checksum field Messages that are transmitted from the FT702L...

Страница 29: ...matically enabled 02DFP 50 cr lf Without a checksum FT702LT checksum validation automatically disabled 02DFP cr lf A checksum value is always transmitted by the FT702LT with every outgoing message How...

Страница 30: ...4 9 Heater settings HT Setpoint Temperature Heater Start Delay Time Current Limit Undervoltage Limit Heater Disabled 4 seconds delay 4 Amps 9 Volts 6 4 9 6 4 11 6 4 12 Listener and talker identifiers...

Страница 31: ...length 1 64 6 4 8 6 4 9 Heater settings HT Setpoint Temperature 0 C to 44 C Setpoint Temperature 44 C to 55 C Percentage of heater current 0 to 100 Internal sensor temperature 00 C to 99 C Heater Dela...

Страница 32: ...is 0 5m s To load the User Calibration Table with data the following steps need to be taken 1 The Table must first be cleared See section 6 4 20 2 Each pair of table row values is entered into a RAM...

Страница 33: ...for a predefined delay before sending a response This delay time is programmable in increments of 50ms See Section 6 4 6 for details of how the delay between the sensor receiving a command and transmi...

Страница 34: ...Default Setting 3 Set the baud rate to 4800 baud 4 Set the baud rate to 2400 baud 5 Set the baud rate to 1200 baud Examples Example 1 Set the baud rate to 19200 baud verify the new setting and send a...

Страница 35: ...D status D Always returns D Examples Example 1 The datum direction of the FT702LT is rotated by 5deg to the left with respect to the sensor s mounting flat as per Figure 9 Message Comment 01 CF355 0 c...

Страница 36: ...ble CU mode 01 CU cr lf Query CU mode setting WI CU D 00050 44 cr lf FT702LT response Description Use the CU command to enable or disable the continuous update mode of operation When continuous update...

Страница 37: ...NMEA m s 01 DF cr lf Query format setting WI DF N 43 cr lf FT702LT response Example 2 Set the wind velocity output data format to NMEA with wind speed in knots and verify the new setting Message Comme...

Страница 38: ...of hours that the anemometer has been in operation during its lifetime Examples Example 1 Query the Run Timer Counter Message Comment 01 DG T cr lf Query Run Time Counter WI DG 012897 CF cr lf FT702LT...

Страница 39: ...rify 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 FT702LT response Description Use the DL command to set the delay interval from w...

Страница 40: ...g 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 FT702LT 0 ASCII 30...

Страница 41: ...r 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 filte...

Страница 42: ...fault Setting 0008 Examples Example 3 Modify the filter s dimensions Verify that the command has been accepted Message Comment 01 FLL0001 0032 cr lf Set speed filter length to 1 and direction filter l...

Страница 43: ...r fully on temp 99 to 99 read only parameter that returns the current internal temperature of the FT702LT In C in range 00 to 99 C Examples Example 1 Set the FT702LT set point temperature to 5 C Verif...

Страница 44: ...period after sensor power on before the heater will be enabled Factory Default is 004 4 seconds Examples Example 3 Set the FT702LT heater delay to 010 Verify that the command has been accepted Messag...

Страница 45: ...6 0A Factory default is 40 4 0 Amps UVoltLimit 09 to 17 Heater Under Voltage Limit in Volts If the supply voltage falls below the under voltage limit the heater will be turned off until the supply re...

Страница 46: ...fier Factory Default RxID 01 TxID 00 to ZZ The FT702LT 2 digit talker address identifier Factory Default TxID WI Examples Example 1 Set the FT702LT listener address identifier to A1 and the talker add...

Страница 47: ...d 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 cu...

Страница 48: ...000 material temperature 00 to FF The material temperature is given as a hexadecimal value The HT Query command is the recommended method for obtaining material temperature readings Examples Example 1...

Страница 49: ...Reset sensor reloading last settings Description Use the RS command to reset the FT702LT software The sensor will be ready to receive new commands or take readings from a maximum of 2 seconds after an...

Страница 50: ...ces after the 2 digit number are reserved for future use Examples Example 1 Read the sensor serial number and build version Message Comment 01 SN cr lf Query serial number WI SN 02350 130 06 33 cr lf...

Страница 51: ...h cr lf FT702LT output talkerID SV SoftwareVersion checksum cr lf aa SV sssx xss hh cr lf Parameters SoftwareVersion 1 0 to 9 9 Software version of the sensor The spaces are reserved for future use Ex...

Страница 52: ...5174 70 cr lf Typical FT702LT response Description Use the UC command to enable or disable the implementation of the user calibration table for calibrating wind speed readings The four digit user cal...

Страница 53: ...es 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 FT702LT response Description Use the UCCLEAR...

Страница 54: ...r 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 entered Examples Example 1 Enter user cali...

Страница 55: ...04 cr lf Query user calibration table status WI UC 55 E 5174 5174 70 cr lf Typical FT702LT response Example 2 Read calibration data stored in row 5 of the Flash calibration table Message Comment 01 U...

Страница 56: ...xxx 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 Set the User Calibration label to...

Страница 57: ...r lf Set saved parameters 01 US cr lf Query the saved parameters WI US F 4F cr lf FT702LT response Description There are three copies of Parameters stored in Flash memory namely User Parameters Factor...

Страница 58: ...6 for the details of the RSS command After RSF and RSS commands are executed the restored parameters are loaded into RAM so it is imperative to execute any one of the Set Commands described in section...

Страница 59: ...ror Examples Example 1 The following example illustrates the polar wind velocity data format The example shows the FT702LT output with a wind speed of 20m s and a wind angle of 45deg Message Comment 0...

Страница 60: ...e example shows the FT702LT output in m s with a wind speed of 20m s and a wind angle of 45deg Message Comment 01 WV cr lf Query the wind velocity WIMWV 045 R 020 0 M A 3D cr lf FT702LT NMEA response...

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