Vaisala HMP243 Guia do Utilizador descarregar pdf (Página 85)

HMP240

M210300en Appendix 1: Serial commands

The processor does not allow the following combinations:

• no parity, 7 data bits, 1 stop bit: if this combination is given the

HMP240 programme will change the number of stop bits to 2

• even or odd parity, 8 data bits, 2 stop bits: if this combination is given

the programme changes the number of stop bits to 1

When the half-duplex mode is set, it will automatically turn the echo off. Even

then the ECHO command can indicate that echo is on.

UNIT Selecting the output units

UNIT x <cr>

x = m(etric units) n(on-metric units)

metric units non-metric

units

RH %RH %RH

°C °F

a g/m

gr/ft

x g/kg gr/lb

°C °F

For example, the command for setting the non-metric units is:

>UNIT N <cr>

Output units : non metric

When the command is given with no parameters, the transmitter outputs the

currently valid setting.

ADDR Setting the transmitter address

ADDR aa <cr>

aa = address (0...99)

The address is used when more than one transmitter is connected to one serial

bus. The ADDR command makes it possible to communicate with one

transmitter at a time in POLL state.

For example, transmitter is given address 99

>ADDR <cr>

Address : 2 ? 99 <cr>

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 129 130

Sem comentários

Vaisala HMP243 Guia do Utilizador Página 85