X-On/X-Off Flow Control - SATO LC400e Series Operator's Manual

Section 7: Interface Specifications
7.2 RS-232C HIGH SPEED SERIAL INTERFACE (Cont'd)
DB9 DB25
1 1
2 3
3 2
8 5
4 20 DTR (Data Terminal Ready)
6 6 DSR* (Data Set Ready)
5 7
* This connection at the host side of the interface would depend upon the pin that is being used as the Ready/Busy signal
by the driving software. Typically, on a PC, it would be either CTS (pin 5) or DSR (pin 6) on a DB-25 connector.

7.2.4 X-ON/X-OFF Flow Control

Communicates with the host to determine if the printer is ready to receive data by sending "XON" (HEX 11H) or "XOFF"
(HEX 13H) code to the TD line. The single and multiple item buffers are switchable at the DSW2 of the printer.
DB9 DB25
1 1
2 3
3 2
5 7
Note
Depending on the host used, it may be required to loop CS and RS (maintaining at high-level) on the
host side. For more information, refer to the host computer documentation.
Page 7-4
READY/BUSY CABLE REQUIREMENTS
HOST
FG (Frame Ground)
RD (Receive Data)
TD (Transmit Data)
CTS (Clear To Send)
SG (Signal Ground)
X-ON/X-OFF CABLE REQUIREMENTS
HOST
FG (Frame Ground)
RD (Receive Data)
TD (Transmit Data)
SG (Signal Ground)
DIRECTION DB25
Bi-directional
To host
To printer
To printer DB9-6
To printer DB9-4
To host
Bi-directional
DIRECTION
Bi-directional
To host
To printer
Bi-directional
PRINTER
1 FG (Frame Ground)
2 TD (Transmit Data)
3 RD (Receive Data)
4 RTS (Request To Send)
5 DSR (Data Set Ready)
6 DTR (Data Terminal Ready)
7 SG (Signal Ground)
DB25 PRINTER
1 FG (Frame Ground)
2 TD (Transmit Data)
3 RD (Receive Data)
7 SG (Signal Ground)
LC400e Series Operator Manual