Service connection, Table 5, Checksum table – Vaisala WAC155 User Manual
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User's Guide ______________________________________________________________________
34 ___________________________________________________________________M210822EN-A
Example response:
$PAMWV,50,R,0.0,M,A*04
provides checksums and polling strings for some
typical device IDs.
Service Connection
The service connection allows you to configure the device and gather
status information. The same physical RS-485 interface connection is
used for both the data transmission and the service connection. When
the service connection is opened (using the OPEN command), the data
transmission and query are disabled as long as the service connection
remains open.
When you change any parameters using the service connection,
remember that a reset (or a power-up) is required to take the new
parameters into use.
The commands are not case-sensitive; formats 'COMMAND',
'command', 'Command' and all other combinations of upper and lower
case letters are accepted. However, the device ID is case-sensitive.
Commands are entered on a single line, terminated by a line feed <lf>
or carriage-return <cr> characters. If the terminal provides both
characters as the line end marker, the second EOL character is silently
Table 5
Checksum table
ID Character <id>
Checksum <CS> Polling String
A
72
$WIPAQ,*72<cr><lf>
B
71
$WIPBQ,*71<cr><lf>
C
70
$WIPCQ,*70<cr><lf>
D
77
$WIPDQ,*77<cr><lf>
E
76
$WIPEQ,*76<cr><lf>
F
75
$WIPFQ,*75<cr><lf>
G
74
$WIPGQ,*74<cr><lf>
H
7B
$WIPHQ,*7B<cr><lf>
I
7A
$WIPIQ,*7A<cr><lf>
J
79
$WIPJQ,*79<cr><lf>
K
78
$WIPKQ,*78<cr><lf>
L
7F
$WIPLQ,*7F<cr><lf>
M
7E
$WIPMQ,*7E<cr><lf>
N
7D
$WIPNQ,*7D<cr><lf>
O
7C
$WIPOQ,*7C<cr><lf>