Vaisala HMP110 - Manual (Page 42)

User's Guide ______________________________________________________________________
40 __________________________________________________________________ M211060EN-E
Set Serial Interface Mode
Use the SMODE command to set the operation mode of the serial
interface. The new mode is applied when probe is reset.
SMODE [xxx]<cr>
where
xxx = Operation mode of the serial interface. See Table 8 below.
Table 8
Serial Interface Modes
Mode Description
STOP Probe outputs only when a command is issued. Any command
can be used.
RUN Probe automatically outputs measurement messages on the
serial line. Only command S or the Esc key can be used to stop
the output.
POLL Probe outputs only when a command is issued. Probes
communicate one at a time when the specific address is called on
the serial line, which is useful when more than one probe is
connected to one serial bus. Any command can be used after the
line has been opened using the OPEN command.
See descriptions of the commands ADDR on page 42 and OPEN
on page 50.
VDIGI Special serial interface mode that is only used for interoperability
with Vaisala devices such as HMT120, HMT130, and HM40. This
mode is set at Vaisala for probes that are ordered for such use.
ANALOG No serial line, analog outputs active. For instructions on how to
enter the serial line when in analog mode, see section Terminal
Application Settings for Probes in Analog Mode on page 34.
Example (check current mode):
smode
Serial mode : STOP ?
Example (change mode to POLL mode):
smode poll
Serial mode : POLL
CAUTION Do not switch a digital probe to analog mode. Accuracy of analog
outputs is only guaranteed for probes that have been ordered in analog
output mode from Vaisala.
NOTE In the RUN mode, the probe may send the measurement data message
right as you are typing the S command to stop the sending. Therefore,
you may need to repeat the S command. This must be noted especially
when designing computer programs to access the probe.