Metrohm 794 Basic Titrino - Manuel (Page 130)

3.3 Properties of the RS 232 Interface
794 Basic Titrino 126
Titrino as Receiver :
Titrino as Sender :
Software-Handshake, SWline
Handshake input ports on the Titrino (CTS, DSR, DCD) are not checked.
Handshake output ports (DTR, RTS) are set by the Titrino.
The Titrino is equipped with an input buffer that can accommodate a string of
up to 80 characters + C
R
L
F
. As soon as an L
F
is recognized, the Titrino sends
XOFF. After this, it can receive maximum 6 extra characters and store them.
The string sent previously is now processed by the Titrino. Afterwards, the Ti-
trino sends XON and is again ready to receive.
Titrino external device
Time
Data output
Data input
RxD
TxD
XOFF XON
L
F
max. 4
characters
Data output
disabled
Data output
enabled
Titrino external device
Data output
Data input
max. 22
characters
60 characters
XOFF XON
L
F
RxD
TxD
Time
Time of 4
characters XOFF
String is
processed 400 µs