Vaisala FS11P - Terminal Line Number Adjustment; Command Polling

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 77
Terminal Line Number Adjustment
The command response printout can be adjusted to the screen size of the
used terminal. This feature stops the printout every time the terminal
screen is full. This is especially useful with the small screens of palm top
computers. Without this feature the user will only see the bottom lines of
long command responses such as the STATUS message.
The terminal size adjustment is done with the command
SET TERMINAL_LINES number
The standard PC terminal program has 24 visible lines. This is also the
default value of the parameter. Minimum number is 5 lines. The value of
this parameter has no effect on the message sending when the commands
are given in the command polling format.
Command Polling
All commands can also be executed without opening the command line.
This feature can be used in the host system, for example, for making
automatic status message inquiries of active Warnings or Alarms.
The general command polling format (with A as the unit ID) is
!
FSA
∀
&DO COMMAND
−#
CSUM
∃−∗
Where
!
=
Start of the heading (ASCII 1)
FS
=
FS11P sensor identifier
A
=
First character of the unit identifier, if the
ID is not defined it is replaced by a space
character
∀
=
Start of the text (ASCII 2)
&DO COMMAND
=
Command body
#
=
End of the text (ASCII 3)
CSUM
=
Checksum CRC16
∃
=
End of the transmission (ASCII 4)
−
=
Carriage Return (ASCII 13)
∗
=
Line Feed (ASCII 10)
The response for the command is similarly framed:
!
FSA
∀
FS11P RESPONSE
#
CSUM
∃−∗