Metrohm 781 pH/Ion Meter: Operation via RS-232 Manual de usuario Pagina 25

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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
X
OFF
X
ON
L
F
RxD
TxD
Time
pH/Ion Meter external device
X
OFF
X
ON
Data output
disabled
Data output
enabled
Time
Data output
Data input
RxD
TxD
2
nd
line
L
F
1
st
line
L
F
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