Entering And Exiting The Command Mode; Open; Close - Vaisala PWD22/52 User Manual

Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 49

Entering and Exiting the Command Mode

Before any commands can be given to PWD22/52, the communication
line in PWD22/52 has to be assigned to the operator. Otherwise, it is
assigned to automatic messages or polled communication. The user
assigns the command mode with the OPEN command.

OPEN

If no device identifier (ID) is defined, then type the following:
OPEN
If the ID is defined, for example, as A, type the following:
OPEN A
If the ID is defined but forgotten, type the following:
OPEN *
If there are two or more different sensors connected to the same
RS-485 line, and if the sensors have the same ID, PWD22/52 can be
opened by typing the following command:
OPEN PWD {id number}
PWD22/52 answers as follows:
LINE OPENED FOR OPERATOR COMMANDS
If no input is given within 60 seconds, PWD22/52 closes the line
automatically.

CLOSE

The CLOSE command is used for releasing the line to automatic data
messages or polling commands.
PWD22/52 answers as follows:
LINE CLOSED