USER'S GUIDE____________________________________________________________________
56 __________________________________________________________________ M210543EN-E
The
C
R
E
Q
PW
C
R
command can be used, if only one PWD22/52 unit is on
the line (no ID is set) and the default message is wanted.
PWD22/52 does not echo the polling character string.
The answer message format is the following:
S
H
PW id
S
X
text
E
X
C
R
L
F
The ID has a two-character field because it can be two characters long.
An example of the polled (and automatic) message 0 format is the
following:
S
H
PW 1
S
X
00 500 700
E
X
C
R
L
F
PWD22/52 waits about 100 ms before it transmits the polled message to
give the host time to turn the RS-485 line into the receive mode.
NOTE
For compatibility in the system level, PWD22/52 also accepts FD instead
of PW in the polling commands because the data message formats and
framing are the same as in the VAISALA FD12 and FD12P sensors. If
PWD22/52 is polled by
C
R
E
Q
FD 1 2
C
R
, the answer will start with
S
H
FD
1
S
X
..
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