Vaisala DMP248 Service Manual Page 131

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APPENDIX 4 ________________________________________________________________________
VAISALA ________________________________________________________________________ 125
When the necessary settings have been given, close the line to
transmitters (the command closes all open lines):
>close
line closed
CLOSE command is always given without address. If no lines are
open, there will be no response to the CLOSE command.
POLL mode
If a transmitter has been set to POLL mode, it will respond only to
commands which include its address:
send 22
Td= -47.4 ’C T= 29.1 ’C
Addresses from 1 to 99 can be used. According to the 20 mA current
loop standard, current flows with no transmission on line. A maximum
of 6 devices can be connected on same single loop line, but the
number can be increased to 9 by using dual loop wiring.
Current loop settings
DMP248 settings single pair dual pair
Full duplex/half duplex HDX FDX
Echo on/off OFF ON
Terminal settings single pair dual pair
Line feed after carriage return yes no
HDX/FDX FDX FDX
When terminal is set to general <lf> (line feed) after <cr> (carriage
return), the listings will have two line feeds when also the DMP248
transmitters send line feed.
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