Gill Instruments Ltd
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WindObserver II Pipe Mount
Page 21
Issue 04
Doc. No. 1390-PS-0009
August 2009
Configuring WindObserver II for Half Duplex Operation.
1) Set up Two Terminals: One for RS485 Half Duplex and the other for RS422 Full
Duplex.
SWITCH
WObs
II
RS485
I
/F
(USB)
RS422
I
/F
(USB)
HYPER-TERMINAL
A (Half-D)
HYPER-TERMINAL
B (Full-D)
b (4-wire)
a (2-wire)
One PC (with two USB ports) can be used for both Terminals, although two may be less
confusing.
Note: Power must not be disconnected from the anemometer throughout this procedure.
2) Assuming the unit is set for Full Duplex, connect 9-way at [b] disconnect 9-way at
[a]. Set Switch to position [b] (4 wire).
3) On Terminal B, enter CONFIGURATION MODE. Set Half Duplex (E2). The
CONFIRM> prompt will appear.
4) Disconnect 9-way [b] and connect 9-way [a]. Set Switch to position [a] (2 wire).
5) On Terminal A, type “E” <ENTER> to confirm.
6) The unit should now be configured in Half Duplex mode.
Configuring WindObserver II for Full Duplex Operation.
1) Assuming the unit is set for Half Duplex, disconnect 9-way [b] and connect 9-way
[a]. Set Switch to position [a] (2 wire).
2) On Terminal A, type “E1” to select Full Duplex. The CONFIRM> prompt will
appear.
3) Disconnect 9-way [a] and connect 9-way [b]. Set Switch to position [b] (4 wire).
4) On Terminal B type “E” <ENTER> to confirm.
8.4. Units
The wind speed can be set to any of the following units:
Unit
Abbreviation
Metres per sec
m/s
Knots
knots
Miles per hour
mph
Kilometres per hour
kph
feet per minute
fpm
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