Cable Requirements
READY/BUSY FLOW CONTROL
Ready/Busy is the hardware flow control method for the serial interface on the Se
printers. By raising/lowering the voltage level on Pin 20 of the RS232C port, the
printer notifies the host when it is ready to receive data. Pin 4 (RTS) and pin 20
(DTR) are the important signals on the printer for this method of flow control. The
Page 6-6
PN 900107
5A
SATO M8400RVe
Section 6: Interface Specifications
DB9
DB25
HOST
INTERCONNECTION
DB25
PRINTER
1
1
FG
←→
1
FG
(Frame Ground)
2
3
RD
←
2
TD
(Transmit Data)
3
2
TD
→
3
RD
(Receive Data)
8
5
CTS
←
4
RTS
(Request to Send)
7
4
RTS
→
5
CTS
(Clear to Send)
4
20
DTR
→
6
DSR
(Data Set Ready)
6
6
DSR*
←
20
DTR
(Data Terminal Ready)
5
7
SG
←→
7
SG
`(Signal Ground)
* 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.
PIN
DIRECTION
SIGNAL DEFINITION
1
Reference
FG (Frame Ground)
2
To Host
TD (Transmit Data) - Data from the printer to the host computer.
Sends X-On/X-Off characters or status data (Bi-Directional
protocols).
3
To Printer
RD (Receive Data) - Data to the printer from the host computer.
4
To Host
RTS (Request to Send) - Used with Ready/Busy flow control to
indicate an error condition. RTS is high and remains high unless the
print head is open (in this case, RTS would return to the high state
after the print head is closed and the printer is placed back on-line)
or an error condition occurs during printing (e.g., ribbon out, label
out).
5
To Printer
CTS (Clear to Send) - When this line is high, the printer assumes
that data is ready to be transmitted. The printer will not receive data
when this line is low. If this line is not being used, it should be tied
high (to pin 4).
6
To Printer
DSR (Data Set Ready) - When this line is high, the printer will be
ready to receive data. This line must be high before data is
transmitted. If this line is not being used, it should be tied high (to
pin 20).
7
Reference
SG (Signal Ground)
20
To Host
DTR (Data Terminal Ready) - This signal applies to Ready/Busy
flow control. The printer is ready to receive data when this pin is
high. It goes low when the printer is off-line, either manually or due
to an error condition, and while printing in the Single Job Buffer
mode. It will also go low when the data in the buffer reaches the
Buffer Near Full level.
RS232C Interface Signals
Содержание M-8400RVe Series
Страница 1: ...PN 9001075A M 8400RVe Thermal Transfer Printer Operator and Technical Reference Manual ...
Страница 10: ...This page left intentionally blank Page viii PN 9001075A SATO M8400RVe Preface ...
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Страница 79: ...Printer Output SATO M8400RVe PN 9001075A Page 5 13 Section 5 Programming Reference ...
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Страница 236: ...This page left intentionally blank Page A 14 PN 9001075A SATO M8400RVe Appendix A Quick Command Reference ...
Страница 280: ...This page left intentionally blank Page E 4 PN 9001075A SATO M8400RVe Appendix E Custom Protocol Command Codes ...