Metrohm 758 KFD Titrino Manual do Utilizador descarregar pdf (Página 134)

3.3 Properties of the RS 232 Interface

758 KFD Titrino

130

3.3 Properties of the RS 232 Interface

Data Transfer Protocol

The Titrino is configured as DTE (Data Terminal Equipment).

The RS 232 interface has the following technical specifications:

• Data interface according to the RS 232C standard, adjustable transfer pa-

rameters, see pages 12 and 113.

• Max. line length: 512 characters

• Control characters: C

(ASCII DEC 13)

(ASCII DEC 10)

XON (ASCII DEC 17)

XOFF (ASCII DEC 19)

• Cable length: max. approx. 15 m

Start 7 or 8 Data Bit Parity Bit 1 or 2 Stop Bit

Only a shielded data cable (for example, METROHM D.104.0201) may be

used to couple the Titrino with foreign devices. The cable shield must be

properly grounded on both instruments (pay attention to current loops; always

ground in a star-head formation). Only plugs with sufficient shielding may be

used (for example, METROHM K.210.0381 with K.210.9045).

3.3.1 Handshake

Software-Handshake, SWchar

Handshake inputs on the Titrino (CTS) are not checked.

Handshake outputs (DTR, RTS) are set by the Titrino.

The Titrino sends XOFF when its input buffer contains 384 characters. After

this it can receive 128 extra characters (including L

Titrino as Receiver :

Titrino external device

Data output

Data input

max. 128

characters

384 characters

OFF

RxD

TxD

Time

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 209 210

Sem comentários

Metrohm 758 KFD Titrino Manual do Utilizador Página 134