Page 386004-90(G)5.3.4 NMEANMEA format provides continuous wind measurements in standardNMEA marine sentences at 4800 baud. Use RS-485 OUTPUT ONLYserial output mode with YOUNG Model 06206 Marine Wind Trackeror other NMEA-capable device.NMEA FORMAT$WIMWV,ddd,R,www.w,N,A*ccwhereddd = Wind direction (degrees)www.w = Wind speed (knots)* = Asterisk (ASCII 42)cc = Checksum = Carriage return, line feed (ASCII 13, 10)CHECKSUM is the two-character printable hexadecimal valuegenerated by taking the exclusive-or of all characters between '$'and '*'.5.4 LOW POWER OPERATIONAverage current consumption with default settings is about 20 mA.This configuration uses minimal power and enables all features eventhough they may not be used. This is suitable for many low powerapplications.To reduce current consumption further, additional strategies includedisabling unused outputs, using polled serial operation, increasingthe output interval, and limiting the sample count to the minimumoptimal number. Faster baud rates also reduce power by limitingtransmit duration.6.0 SETTING OUTPUTS AND OPERATINGPARAMETERS6.1 SENSOR CONFIGURATION WITH 86SETUP PROGRAM(RECOMMENDED)The YOUNG 86SETUP program is available from the factory web siteat www.youngusa.com. It provides an easy method for checking andconfiguring sensor operation. Install the program on a Windows PCand follow instructions that appear on the program screen to retrievecurrent sensor settings or send new settings.6.2 SENSOR CONFIGURATION USING A GENERAL-PURPOSE COMMUNICATIONS PROGRAMA general purpose text-based serial communications program likeHyperTerminal may be used to manually configure the sensor bysending simple text commands.The YOUNG sensor and communication program must operate atthe same baud rate and be properly connected. Sensor RS-232mode must be enabled. See the RS-232 Wiring diagram, Fig A3,in Appendix A.Factory default sensor baud rate is 9600, but may be set to 1200,4800, 19200 or 38400. Configure the serial communications programfor NO handshaking and 1 start, 8 data, 1 stop bit.The sensor must be in COMMAND MODE in order to set parameters.Enter COMMAND MODE by sending three ESC characters (ASCII27) in quick succession while the sensor is running. When the sensoris in COMMAND MODE, it sends a '>' prompt character indicatedthat it is ready to accept commands.If the prompt does not appear after sending three ESC characters,re-check wiring and communication program setup. If the sensorbaud rate is unknown, try sending the ESC characters at each ofthe five available baud rates (1200, 4800, 9600, 19200 and 38400).It is also possible that sensor parameters have been purposelyconfigured to disable RS-232 mode. If this the case, the followingmethod must be used.In order to provide access under all conditions, the sensor alwaysbegins operation at power up with serial communications set to 38400baud and RS-232 connections enabled. Immediately after power up,there is a short time window in which to send the ESC charactersand enter COMMAND MODE.To use this feature, set your serial communication program baud rateto 38400. Remove power then wait 5 seconds. Re-apply power tothe sensor. The sensor will transmit four asterisks immediately afterpower up. After the asterisks appear, send three ESC characters.The COMMAND MODE '>' prompt should appear.6.3 COMMAND OVERVIEWAfter the '>' prompt appears, send '??' to display a list of availablecommands. Send 'RPTV' to report current settings. (Note that somevalues in the report are for factory settings cannot be changed bythe user.)Commands are case sensitive and the exact format must be used.For example, the SET01nn command requires two digits for the serialformat code. If you send SET014 instead of SET0104 the sensor willreject the command and indicate an error. End all commands witha carriage return (ASCII 13). In HyperTerminal, do this by pressingthe ENTER key.After receiving the carriage return, the sensor will evaluate thecommand. Valid commands will be executed. Current settings can beevaluated at any time by sending RPTV to get a new report.IMPORTANT NOTE:The YOUNG 86SETUP program automatically saves allsettings to flash memory when they are sent to the sensor.Settings that are changed manually must be saved to flashwith the SET77 command.
