Metrohm 788 IC Filtration Sample Processor User Manual
Page 138
5 Interfaces
788 IC Filtration Sample Processor
130
788 IC Filtration Sample Processor as
sender:
RxD
TxD
XOFF
L
F
XON
Software handshake with line stop (SWline)
Handshake inputs are (CTS, DSR, DCD) are not checked at the 788 IC
Filtration Sample Processor, handshake outputs (DTR, RTS) are set.
The 788 IC Filtration Sample Processor has an input buffer which can
accept a string of up to 80 characters + C
R
L
F
. As soon as an L
F
is rec-
ognized, the 788 IC Filtration Sample Processor sends XOFF. After this
time, it can still receive max. 6 characters and store them temporarily.
The string sent previously is now processed by the 788 IC Filtration
Sample Processor. It then sends XON and is again ready to receive.
788 IC Filtration Sample Processor as
receiver:
RxD
TxD
XON
L
F
L
F
XOFF
788 IC Filtration Sample Processor as
sender:
RxD
TxD
XOFF
L
F
XON
L
F
L
F
The transmission of the 788 IC Filtration Sample Processor can be
stopped by the external device with XOFF. After the receipt of XOFF,
the 788 IC Filtration Sample Processor finishes transmission of the line
already started. If the data output is blocked for more than 3 s by XOFF,
"
E43
"
appears in the display.
External device
Data
input
Data
output
Data output
enabled
Data output
disabled
max. 4
char.
Time
788
External device
Data
input
Data
output
788 input
blocked
Process string
400 Ps
Time
788
External device
Data
input
Data
output
Response
1
st
line
Inquiry
Data output of
788 free
Data output of 788
blocked
Time
788