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Pressing F10 will exit the program.
Direct data retrieval from a DOS prompt may be accomplished by entering TWI_LOG ? /dl, where
the ? equals the line of the unit as defined in the twi_com.dat file. For example entering TWI_LOG 1
/dl would access in our current setup the Green unit. Entering TWI_LOG 2 /dl would access the Red
unit. After the data is retrieved the program will return to the DOS prompt. For automatic data
retrieval of multiple units at a predetermined time a commercial PC scheduling program may be
use.
You may look at data that is stored on disk even if you are not tied directly to that weather station by
entering TWI_LOG /ixxx where xxx equals the ID number of the unit (the unit ID may be set using
the F5 function key within TWI_LOG). At the DOS prompt TWI_LOG /I135 would access the data
for unit 135.
REFERENCE
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Control Options
Control options can be changed through the print set routine, see page 13 for directions on
changing this number. These control options can also be changed through the optional TWI_LOG
program F5 screen. The first control option is wind speed scale. When turned on, the wind speed is
in knots instead of the normal mile per hour or kilometer per hour when in metric scale. The second
control option selects the manner in which the time is displayed. 24 hour military style or the AM PM
format. When on, the AM PM style is displayed. Aux display disable is the third option, when it is on
the temperature display cycles between the indoor and outdoor values only. If you do not have
options such as aux temperature or solar radiation aux display disable should be turned on. Instant
wind speed output is the fourth option. When turned on the windspeed output to the RS-232 port is
an instant reading rather than a one minute average.
To turn on the desired control options via the weather station display, refer to the table below, add
up the values of the controls that should be turned on and enter that value into the weather
instrument via the print set function (see page 11). The default value is 224. For example if you
wanted AM PM turned on and instant wind speed output turned on you would add 32+128 which
equals 192. Enter 192 into the weather instrument via the print set function.
Option Value
Knots on 16
AM PM on 32
Aux disable on 64
Instant wind speed on 128
total
You may also change these functions via the software program TWI_LOG F5 routine RS-232
Interface
RS-232 Interface
WR-25 Instruction Manual
Texas Weather Instruments, Inc. WR-25 Instruction Manual