Metrohm 774 Oven Sample Processor - Manual (Page 139)

5.12 Properties of the RS232 Interface
774 Oven Sample Processor, Instructions for use 133
774 Oven Sample Processor as Sender:
Time
RxD
TxD
Data output
Data input
LF LF
LF
Data output
disabled Data output
enabled
Request
1.Line Response
XON XOFF
external device Sample Changer
Changer transmission can be stopped by external instruments with XOFF.
After XOFF is received the changer completes sending the line already
started. If data output is disabled for more than 3 s by XOFF, E43 appears
in the display.
Hardware-Handshake, HWs
774 Oven Sample Processor as Receiver:
Time
DTR
LF
RxD RxD
external device Sample Changer
DTR
774 Oven Sample Processor as Sender:
Time
RTS RTS
LF
TxD TxD
CTS CTS
external device Sample Changer
The data flow can be interrupted by deactivating the CTS line.