
Chapter 4 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 115
ECHO
Use the ECHO command to set the user port echo. The command either
enables or disables echo of characters received.
ECHO [x]<cr>
where
x = ON (enabled, default) or OFF (disabled)
NOTE
When using the RS-485 Interface with a 2-wire connection, always
disable echo. When using a RS-232, RS-422/485 4-wire connection,
LAN, or WLAN, you can enable or disable it as you wish.
Data Recording
Data recording function is always on and collects data automatically into
the memory of the device. If the optional data logger module is installed,
the transmitter uses it automatically. Recorded data does not disappear
from the memory when the power is switched off. Collected data can be
observed in a form of a graph in the graphical view of the display or it
can be listed out by using the serial line or MI70 Link program.
Selecting Data Recording Quantities
If the device is provided with the optional display, the recorded quantities
are always those selected for the display. Up to four quantities can be
recorded at a time. For instructions on how to select the display quantities
with the keypad, see section Changing Quantities and Units on page 100.
DSEL
Use the serial line command DSEL to select the quantities to be recorded
if the transmitter is not equipped with display/keypad.
DSEL [xxx]<cr>
where
xxx = Data recording quantity. See Table 3 on page 19 and Table 4
on page 19 for the quantities.
Example:
>dsel rh t tdf
RH T Tdf
>
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