X-On/X-Off Flow Control - SATO CL608VA Operator And Technical Reference Manual

Cable Requirements
HOST
FG
TD
*
SG
* 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.
Data Streams
Once the flow control method has been chosen for the RS232C interface, the data
stream must be sent in a specific manner. The
frame the data stream.
<STX><ESC>A . . Job#1 . . <ESC>Z<ETX><STX><ESC>A . . Job#n . . <ESC>Z<ETX>
NOTE: All characters, including STX, ESC and ETX are in ASCII.

X-On/X-Off FLOW CONTROL

control is not available or desirable. Instead of a voltage going high/low at pin 20,
control characters representing "Printer Ready"
Busy" (
Data) to the host. In order for this method of flow control to function correctly, the
host must be capable of supporting it.
the function of pin 20 (
powered on and goes on-line, an
when the printer receives a viable job, it transmits an
When it is done printing, it transmits an
printer sends an
when the data level of the buffer drops below the "Buffer Available" mark. When the
printer is taken off-line manually, it transmits an
data. When it is placed back on line manually, it sends an
available for receipt of data. If an error occurs during printing (paper out, ribbon
out), the printer sends nothing in the Single Job Buffer mode since the last character
transmitted was an
printing, no
again ready to receive the next job. If it is in the Multi Job Buffer mode, it sends an
as soon as an error condition is detected. When the error is cleared and the
printer is placed back on-line, it transmits an
accept data.
Upon power up if no error conditions are present, the printer will continually send
characters at five millisecond intervals until it receives a transmission from the
host.
SATO CL Series Printers
INTERCONNECTION
flow control must be used whenever hardware (Ready/Busy) flow
= 13 hexadecimal) are transmitted by the printer on pin 2 (Transmit
) as previously explained. When the printer is first
when the "Buffer Near Full" level is reached and a
. When the error is cleared and the printer resumes
is sent until the current job is completed and the printer is once
9001035 Rev. E
Section 5. Interface Specifications
PRINTER
1 FG (Frame Ground)
3 RD (Receive Data)
4 RTS (Request to Send)
5 CTS (Clear to Send)
6 DSR (Data Set Ready)
20 DTR (Data Terminal Ready)
7 SG (Signal Ground)
and control characters must
=11 hexadecimal) or "Printer
operates in a manner similar to
is sent out. In the Single Job Buffer mode,
and begins printing.
. In the Multi Job Buffer mode, the
indicating it cannot accept
indicating it is again ready to
, indicating it is again
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