Vaisala BAROCAP PTB330 Guia do Utilizador descarregar pdf (Página 67)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 65

User Port Connection

Use a suitable serial cable between the user port’s RxD, GND, and

TxD screw terminals and the PC serial port.

NOTE

Do not use the user port when RS-485 module is connected.

Table 10 Default Serial Communication Settings for the User

Port

Parameter Value

Bit rate 4800

Parity Even

Data bits 7

Stop bits 1

Flow control None

1 2 3 4 5

6 7 8 9

–

RxD

GND

TxD

POWER

CONTROL

USER PORT POWER

RS-232 10…36 V=

IOIOI

Figure 37 Connection Example Between PC Serial Port and

User Port

Connections to pins 4, 6, 7, and 8 on PC serial port are required only if

you are using software requiring hardware handshaking.

After power-up, the barometer (in STOP mode) outputs the software

version and the command prompt.

In RUN mode, a measurement output starts immediately after power-

up.

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Vaisala BAROCAP PTB330 Guia do Utilizador Página 67