Metrohm 766 IC Sample Processor - Manual (Page 112)

5.2 RS232 interface
766 IC Sample Processor
107
766 IC Sample Processor as sender:
LF
DCD
CTS
TxD
DCD
CTS
TxD
DSR DSR
RTS RTS
The data flow can be interrupted by deactivation of the CTS line.
Software handshake with character stop (SWchar)
Handshake inputs are (CTS, DSR, DCD) are not checked at the 766 IC
Sample Processor, handshake outputs (DTR, RTS) are set.
As soon as an L
F
is recognized, the 766 IC Sample Processor sends
XOFF. After this time, it can still receive 6 characters and store them
temporarily.
However, the 766 IC Sample Processor also sends XOFF when its input
buffer contains 60 characters. After this time, it can still receive maxi-
mum 22 characters (incl. L
F
).
If the transmission is interrupted for the time of 4 characters after the
766 IC Sample Processor has sent XOFF, the string previously received
will be processed even if no L
F
has been sent.
766 IC Sample Processor as receiver:
RxD
TxD
XOFF XOFF XON
L
F
External device
400 µ s String
processing
Data
input
Data
output
Time of 4
char.
max. 22
char.
Time
60 char.
766
External device 766
Time