User manual

MetPak Doc No 1575-PS-0001 Issue 02 CN 4240 March 2006
8 OUTPUT FORMATS
On applying power to the MetPak, it will provide measurements in one of the following formats:
 SDI-12 (Polled) – See section 10
 Analogue Voltage output see section 9
An RS232 port is located inside of the junction box to enable changes to be made to the factory settings or for fault
diagnostics. You will need to connect a PC to the RS232 programming port. You can communicate with the anemometer
using the free Gill WindCom software or using Hyperterminal. Instructions for using Hyperterminal are given below.
Configuring Hyperterminal
Note – Other terminal emulators are configured in a very similar way.
1. Decide on an available Com port that you want to use (Usually Com1).
2. Run Hypertrm.exe (Typically accessed via Start Programs Accessories Hyperterminal)
3. Create a New Connection (File  New Connection)
4. Enter a Name (eg WindSonic 1) .
5. Change ‘Connect Using’ to ‘Direct to Com 1’ (or other Com port as required)
6. Adjust the Port settings to match WindSonic settings. WindSonic default settings are :
Bits per second 9600 Data bits 8 Parity None
Stop bits 1 Flow Control (Handshaking) None
Example of message format:
 Q, 229, 002.74, M, 00,  06
See Section 10 Configuring if you need to change WindSonic settings.
This RS232 programming port will default to Gill – Polar – Continuous. Details are available in section 8.1, this allows
changes to the analogue output factory setting.
8.1 Gill format– Polar, Continuous (Default format) available for RS232
programming port.
<STX>Q, 229, 002.74, M, 00, <ETX> 06
WindSonic
node address
Wind
direction
Wind
speed
Units Status Check
sum
Where:
<STX> = Start of string character (ASCII value 2)
WindSonic node address = Unit identifier
Wind direction = Wind Direction
Wind speed = Wind Speed
Units = Units of measure (knots, m/s etc)
Status = Anemometer status code (see Section 12.5
for further details)
<ETX> = End of string character (ASCII value 3)
Checksum = This is the EXCLUSIVE – OR of the bytes
between (and not including) the <STX>
and <ETX> characters.
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