2 open & close – Vaisala HMP260 User Manual
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HMP260 SERIES
HMP260-U017en-1.5
Operating Manual
1997-11-25
37
In POLL mode: measurements output only with command SEND. When in
POLL mode, the output state is changed as follows:
OPEN aa
SMODE xxxx
aa
=
address of the transmitter
xxxx
=
STOP, RUN or POLL
The OPEN command sets the bus temporarily in STOP mode so that the
SMODE command can be given.
Example:
>SMODE STOP
setting STOP mode
Serial mode : STOP
5.4.3.2
OPEN & CLOSE
OPEN nn
nn
=
address of the transmitter (0...99)
CLOSE
In STOP mode: command OPEN has no effect, CLOSE sets the transmitter in
POLL mode
In POLL mode: command OPEN sets the transmitter temporarily in STOP
mode, command CLOSE returns the instrument to POLL
mode
Example:
relative humidity calibration is performed at transmitter 2 which is in POLL
mode
OPEN 2
opens the line to transmitter 2
CRH
calibration started
...
CLOSE
line closed