Vaisala FS11P - Page 111

Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 109
The polling command format is the following:
−%PW id message_number−
where
−
=
ASCII character 13 hex (Carriage Return)
%
=
ASCII character 05 hex (CTRL-E).
id
=
Selected in the configuration.
message number
=
This is optional.
−
=
ASCII character 13 hex (Carriage Return)
When the PWD32 unit number one (ID=1) is polled for message number
7, the command format is the following:
−%PW 0 7 −
PWD32 does not echo the polling character string.
The answer message format is the following:
!PW id∀text#−∗
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:
!PW 1∀00 500 700#−∗
PWD32 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, PWD32
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
PWD32 is polled by
−%FD 1 2−, the answer will start with !FD 1∀..