Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 51
Entering and Exiting 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, type:
OPEN
If the ID is defined, for example, as A, type:
OPEN A
If the ID is defined but forgotten, type:
OPEN *
If there are two or more different sensors connected to the same
RS-485 line, and if the sensors have the same ID, open PWD22/52 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
Use the CLOSE command to release the line to automatic data messages
or polling commands.
PWD22/52 answers as follows:
LINE CLOSED
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