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32500-90(S)

Please refer to SERIAL FORMAT DIAGRAM and WIRING DIAGRAM in 

the Appendix for additional details.

3.3 JUMPERS

W1 JUMPERS  A, B, and C, determine serial output format. Jumper 

configurations and associated output format are listed below: 1 signifies 

that jumper is installed, 0 signifies that jumper is omitted. See the 

SERIAL FORMAT DIAGRAM in the Appendix for more details.

A  B  C  SERIAL OUTPUT FORMAT (Baud Rate, Output Rate)

  

0   0   0  ASCII Ouput (9600, 2Hz)

0   0   1  Polled ASCII (9600)

0   1   0  NMEA1 (4800, 2 Hz)

0   1   1  NMEA2 (4800, 2 Hz)

1   0   0   RMYT (9600, 15 Hz)

1   0   1   PRECIP (9600, 15 Hz)

1   1   0   PRECIPT POLLED (9600)

1   1   1  SOFTWARE Mode (set by user, see section 4.2)

ASCII and POLLED ASCII are general purpose outputs that may be 

used with the YOUNG 26800 or devices that can communicate serially. 

NMEA outputs are generally for marine applications. RMYT is a propri-

etary format for use with the YOUNG Wind Tracker.

PRECIP and PRECIP POLLED formats configure VIN4 to count tips 

from a tipping bucket precipitation gauge. (Requires a 10K ohm resistor 

between EXC and VIN4.)

SOFTWARE mode allows output format and other parameters to be set 

using serial commands. Please see section 4.0 SERIAL COMMUNICA-

TION and the SERIAL FORMAT DIAGRAM for more information.

W2 & W3 JUMPERS determine output connection type. Only one 

connection type may be used at a time. Please refer to the WIRING 

DIAGRAM in the Appendix for jumper location and connection details.

JUMPERS   

         OUTPUT TYPE

VOUT 

Calibrated output for wind speed and direction.  

 

OUT1  

0-5000mV = 0-100 m/s Wind Speed

OUT2  

0-5000mV = 0-360 degrees Wind Direction

232 

RS-232 full duplex serial

485 

RS-485 half duplex serial

4.0 SERIAL COMMUNICATION

The 32500 uses either full-duplex RS-232 or half-duplex RS-485 signals 

for serial communication. RS-232 is the most simple and operates up 

distances of 30m (100ft).  The RS-485 option is preferred in electri-

cally noisy environments, in applications where multiple units must be 

networked, or in NMEA marine applications where RS-485 signals are 

required.

The full duplex RS-232 connection may transmit and receive serial data 

at the same time.

The RS-485 connection is half-duplex meaning the unit cannot transmit 

and receive at the same time. The 32500 internally manages the switch 

between modes.

Many applications require the 32500 to transmit only. However, RS-485 

applications that require polling the 32500 or sending commands to it 

require that the externally connected serial device must be capable of 

managing its own half-duplex switching from transmit to receive.

At low baud rates with proper cable installation and connections, trans-

mission distances up to 7km (4mi) are possible using RS-485.

Baud rates of 1200, 4800, 9600, 19.2K, and 38.4K baud are available. 

Most jumper-selected output formats force the baud rate to a predeter

-

mined value. All serial signals use 1 start, 8 data, and 1 stop bit. Any 

externally connected serial device must be set to the same baud rate as 

the 32500.

4.1 POLLING

When the serial output format is ASCII POLLED or PRECIP POLLED, 

the 32500 sends data only when it receives a serial polling command:

Ma!

where ‘a’ is the unique address of the unit. The default address is ‘A’ but 

any alphanumeric character may be used (see POLLING CHARACTER 

in section 4.2 SERIAL COMMANDS).

See the  SERIAL FORMAT DIAGRAM for details on ASCII POLLED 

data format.

4.2 SERIAL COMMANDS

Serial commands set operating parameters and report settings.

Jumper W1 must be configured for SOFTWARE mode for serial 

command settings to be retained, otherwise default settings 

based on jumper configuration will take effect at next power up. 

Commands may be sent using a PC and simple communications 

programs such as HyperTerm or any other properly configured 

serial device. All commands that begin with CMD must end with a 

carriage return (ASCII 13).

Commands may be sent at any time but it may be more conve-

nient to pause 32500 serial output. This is especially necessary 

with half-duplex RS-485 communication.

 

Command Description

 CMD100 

OPERATE

 CMD110 

PAUSE

  CMD200  n 

DAMPING  (0=NONE,  1=FAST,  2=SLOW)                                        

  CMD210  n 

FORMAT 0  ASCII

 

 

 

1 ASCII POLLED

 

 

 

2 NMEA (KTS, DIR)

 

 

 

3 NMEA (KTS, DIR, TEMP, RH, BARO

 

 

 

4 RMYT

 

 

 

5 PRECIP

 

 

 

6 PRECIP POLLED

 

 

 

7 ASCII 2

 

 

 

9 DIAGNOSTIC

  CMD220 n 

OUTPUT RATE (0=15Hz, 1=0.1Hz, 2=2Hz)

  CMD230 c 

POLL CHARACTER (0-9, A-Z)

  CMD240 nn  BAUD RATE

 

 

(12=1200, 48=4800, 96=9600, 192=19200,  

 

  

384=38400)

  CMD250 n 

INPUT TYPE (1=PULSE/POT, 2=VIN3/VIN4)

  CMD900 

REPORT PARAMETER SETTINGS

  CMD910 

START COMPASS CALIBRATION

  CMD920 

STOP COMPASS CALIBRATION

  X 

Alternative command to enter OPERATE mode

  3xESC 

Alternative command to PAUSE 

 

 

  3xCNTL-S 

Alternative command to START compass cali- 

 

  

bration

  3xCNTL-X 

Alternative command to STOP compass cali- 

 

  

bration

DAMPING determines the amount of averaging applied to the 

compass measurement.

FORMAT determines serial output format. See Appendix for fur-

ther details. PRECIP formats substitute tipping bucket precipita-

tion counts for the VIN4 voltage measurement. ASCII 2 omits VIN 

measurement values from the output string.

INPUT TYPE determines the type of wind speed and wind direc-

tion signal to use. Type 1 is for standard WS pulse input wind 

speed and WD potentiometer wind direction input. Type 2 is for 

VIN3 (wind speed) and VIN4 (wind direction). With Type 2 voltage 

inputs, 0 to 5000mV = 0 to 100 m/s wind speed and 0 to 540 de-

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