Checking The Serial Port Network Operation; Stop Mode; Poll Mode - Vaisala HMP243 Operating Manual

HMPI243
U145en-2.1 Appendix 2: RS 485/422 serial port module
4. CHECKING THE SERIAL PORT NETWORK OPERATION
teitsurement readings are normally asked with the transmitter in POLL
mode; the command must include the address of the transmitter. If the settings
of the transmitter need to be changed, the transmitter is switched to STOP
mode with command OPEN; commands can then be given without address.
When the line to the transmitter is closed, it returns to POLL mode.
STOP mode
Open the line to the transmitter:
opesn 22<ccz.
114, 22 line, openred lo operator eoarnands
Transmitter no. 22 is now temporarily set to STOP mode; it accepts com-
mands sent without address until CLOSE command is given. Individual set-
tings can now be easily modified. Do not open more than one line at a time.
Use command ? to find out the settings of the active transmitter:
7cr
IM4' 240 / 1.02
CPU serial nr 0
I:eyboacd type :
0B
Addvoss . 7
0u" tut uniLs
I
suetric
Baud P D S : 4800 Z 7 I1FPX
M.srial moid. STOP
nitpur iorrv. . 0 min
1, i. 32
Pressure 1013.25
An alog outputs
Chl 0.00 ... 10.00 V
Ch2 0.00 ... 10.00 V
Chl I R1 1 Io 0.000 tRIn
Chl A 1ll ) hi 100.000 Intl
Ch2 ( T I to -20.000 'C
Cli? T hi 190.000 -C
Transducer
PRI serial nr , 0
Cr:lib,".
date a 0
When the necessary settings have been given, close the line to transmitters
(the command closes all open lines):
>croso
line closed
CLOSE command is always given without address. If no line is open, there
will be no response to the CLOSE commands.
POLL mode
If a transmitter has been set to POLL mode. it will respond only to commands
sent with its address:
send 22
OH. 24.41 111 T. 29.1 "
A
93
X,
.4