Vaisala HMP228 User Manual
Page 64
HMP228 Transmitters
Appendix 1: Serial commands
M210282en-A
58
NOTE
The serial bus settings become effective only after reset.
When the half-duplex mode is set, it will automatically turn the echo off. Even
then the ECHO command can indicate that echo is on.
UNIT
Selecting the output units
UNIT x
x
=
m(etric units)
n(on-metric units)
metric
non-metric
aw
(aw)
(aw)
T
°
C
°
F
For example, the command for setting the non-metric units is:
>UNIT N
Output units : non metric
When the command is given with no parameters, the transmitter outputs the
currently valid setting.
ADDR
Setting the transmitter address
ADDR aa
aa
=
address (0...99)
The address is used when more than one transmitter is connected to one serial
bus. The ADDR command makes it possible to communicate with one
transmitter at a time in POLL state.
For example, transmitter is given address 99
>ADDR
Address : 2 ? 99