Vaisala PWD22/52 - Weather Related Commands

Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 57
Precipitation Sums
PWD22/52 has no internal clock for automatic resetting of the sum data
at certain times. This can be done by the host with the following
command:
E
C
PW id C
C
R
where
E
C
=
ESC (ASCII character 1B hex).
C
R
= Carriage Return (13 hex.)
PWD22/52 then responds to the accepted command with the ASCII
character <
A
K
(06 hex).
The host computer can also maintain its own sum calculated from the
continuous PWD22/52 data. This may be safer, if the PWD22/52 power
breaks often and resets the sums before the scheduled time. The water
sum is automatically reset, when it reaches 99.99 mm and the snow sum
at 999 mm.
List of Commands
PWD22/52 Command Set
HELP
By typing HELP, the operator receives information about available
commands.
Table 14 Command Set
Command Description
OPEN Assigns the line for operator
commands.
CLOSE Releases the line for automatic
messages.
MES Number Displays data message.
AMES Number Interval Automatic message (with parameters
Number and Interval).
CLRS Clears precipitation sums.
STA Displays status.
PAR Parameter message.
HIST Parameter For Vaisala systems use.
INTV Time For Vaisala systems use.