Vaisala DMP248 Wartungshandbuch PDF herunterladen (Seite 49)

CHAPTER 5________________________________________________________________ COMMANDS

VAISALA _________________________________________________________________________ 43

that can be given through the serial interface is S (stop) which ends

the RUN state.

In the STOP state serial commands are given to the transmitters.

Measurements are then output only by entering command SEND.

The POLL state is used when more than one transmitter is connected

to the same serial bus; a single transmitter can be addressed and

communicated with. When the connection to the one transmitter is

opened in the POLL state, the transmitter goes into STOP state and

can then receive commands normally. Closing the connection returns

the transmitter to POLL state. In POLL state the transmitter outputs

measurement only when requested (command SEND aa). If the user

has forgotten the address of the transmitter and the transmitter does

not have a display, the transmitter has to be reverted to the factory set-

tings (see Chapter 0). If the transmitter has a display, the settings can

be checked through it.

Setting the serial interface operation mode

• Select 0RGH in the main menu; the following is displayed:

• Select 6HULDORXWSXW:

• The currently valid setting flashes. Select the desired mode with

the arrow keys and press ENT. After this the programme returns to

the Mode Menu.

• When Run mode is selected, the currently valid output interval is

displayed:

The output interval setting can be changed as follows:

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Vaisala DMP248 Wartungshandbuch Seite 49