Vaisala PTU200 User Manual
Page 33
C
HAPTER
5________________________________________________________________
OPERATING
V
AISALA
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OPEN Setting a transmitter from POLL mode to STOP
mode
CLOSE Setting a transmitter from STOP mode to POLL
mode
OPEN a
where:
a = the address of the transmitter (0...99)
These commands are used to set a transmitter temporarily to STOP
mode and back to POLL mode again. The OPEN command is useful
when several transmitters are connected to one serial bus and
communication with a single transmitter is needed. The CLOSE
command is a global command and requires no address.
The PTU200 series transmitters must always be closed after the POLL
mode selection. The RESET command and powering-up will close the
PTU200 series transmitters automatically.
>addr 7
Address
:
7
>smode poll
Serial mode
: POLL
>close
line closed
Example of opening and closing a transmitter with address 7:
open 7
(text invisible)
PTB
7 line opened for operator commands
>
Any commands (except for the ? command) can now be used for the
transmitter with address 7 without affecting other transmitters with
different addresses connected to the same serial interface. However, if
the RESET command is given or the transmitter is powered-up, the
transmitter will automatically return to the POLL mode.
Example of closing a transmitter:
>close
line closed