Metrohm 732 IC Detector - Manual (Page 187)

6 Interfaces
732 IC Detector / 733 IC Separation Center
180
732 IC Detector as sender:
RxD
TxD
XOFF
L
F
XON
Software handshake with line stop (SWline)
Handshake inputs (CTS, DSR, DCD) are not checked at the 732 IC
Detector, handshake outputs (DTR, RTS) are set.
The 732 IC Detector 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 recognized, the 732 IC
Detector sends XOFF. After this time, it can still receive max. 6 charac-
ters and store them temporarily. The string sent previously is now proc-
essed by the 732 IC Detector. It then sends XON and is again ready to
receive.
732 IC Detector as receiver:
RxD
TxD
XON
L
F
L
F
XOFF
732 IC Detector as sender:
RxD
TxD
XOFF
L
F
XON
L
F
L
F
The transmission of the 732 IC Detector can be stopped by the external
device with XOFF. After the receipt of XOFF, the IC Detector finishes
transmission of the line already started. If the data output is blocked for
more than 3 s by XOFF, " RS error 43 " appears in the display.
External device
Data
input
Data
output
Data output free Data output
blocked
max. 4
char.
Time
732
External device
Data
input
Data
output
732 input
blocked
Process string 400 µ s
Time
732
External device
Data
input
Data
output
Response 1 st line
Inquiry
Data output of
732 free
Data output of 732
blocked
Time
732