Metrohm 781 pH/Ion Meter: Operation via RS-232 Instrukcja Użytkownika Pobierz pdf (Strona 25)

3 RS232 interface properties

780/781 pH/Ion Meter - Operation via RS232 23

Software-Handshake, SWline

Handshake input ports on the pH/Ion Meter (CTS) are not checked.

Handshake output ports (DTR, RTS) are set by the pH/Ion Meter.

The pH/Ion Meter has an input buffer which can accept up to 512

characters.

pH/Ion Meter as Receiver :

pH/Ion Meter as Sender:

pH/Ion Meter transmission can be stopped by external instruments with

XOFF. After XOFF is received the pH/Ion Meter completes sending the

line already started. If data output is disabled for more than 6 s by

XOFF, E43 appears in the display.

pH/Ion Meter external device

Data output

Data input

max. 128

characters

384 characters

OFF

RxD

TxD

Time

pH/Ion Meter external device

OFF

Data output

disabled

Data output

enabled

Time

Data output

Data input

RxD

TxD

line

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Metrohm 781 pH/Ion Meter: Operation via RS-232 Instrukcja Użytkownika Strona 25