User's Guide _______________________________________________________________________
44 ___________________________________________________________________ M211060EN-H
Example (shows default settings):7
seri
Baud P D S : 19200 N 8 1
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 13 below.
Table 13
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 46 and
OPEN
on page 55.
MODBUS Measurement outputs must be read from the transmitter using the
Modbus protocol. For more information on Modbus, see Modbus
Communication on page 37 and Appendix A, Modbus Reference
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 Accessing
Serial Line Command Interface (RS-485 Mode) from Analog or
Modbus Mode on page 36. Note that analog output channels are
not available in the digital-only HMP110. See Output Options on
Example (check current mode):
smode
Serial mode : STOP ?
Example (change mode to POLL mode):
smode poll
Serial mode : POLL
