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3.3 Properties of the RS 232 Interface
3.3 Properties of the RS 232 Interface
3.3.1 Handshake
Software-Handshake, SWchar
Titrino as Receiver :
Titrino
RxD
TxD
90
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 75.
• Max. line length:
• Control characters:
• Cable length:
Start
7 or 8 Data 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).
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
max. 128
characters
384 characters
XOFF
512 characters
C
(ASCII DEC 13)
R
L
(ASCII DEC 10)
F
XON (ASCII DEC 17)
XOFF (ASCII DEC 19)
max. approx. 15 m
Parity Bit
L
F
XON
Time
1 or 2 Stop Bit
).
F
external device
Data output
Data input
795 KFT Titrino
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