Vaisala HMP243 Betriebsanweisung PDF herunterladen (Seite 110)

HMP240

Appendix 3: Digital current loop module M210300en

108

Ch2 ( T ) hi 180.000 'C

Transducer :

PRB serial nr : 0

Calibr. date : 0

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 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

RH= 24.4 %RH 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.

More than one baud rate can be used on a current loop line. E.g. the host of

the line can use different baud rates with different devices (this makes it pos-

sible to use the same address for several devices).

Current loop settings

HMP240 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 where also the HMP240 transmitters send

line feed.

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 129 130

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