Vaisala HMP260 - Manual (Page 43)

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 <cr>
SMODE xxxx<cr>
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 <cr> setting STOP mode
Serial mode : STOP
5.4.3.2 OPEN & CLOSE
OPEN nn <cr>
nn = address of the transmitter (0...99)
CLOSE <cr>
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 <cr> opens the line to transmitter 2
CRH <cr> calibration started
...
CLOSE <cr>
line closed