Switching between on line and off line
The printer does not have an on-line/off-line button. It goes off line under the following
conditions:
❏
Between the time when power is turned on (including reset using the interface) and when
the printer is ready to receive data.
❏
During the self-test.
❏
During paper feeding using the paper FEED button.
❏
Between the time when the printer stops printing for a paper-end and when the on-line
recovery wait time finishes after loading paper (if an empty paper supply is detected by
either the paper roll end detector or the paper roll near-end detector with a printing halt
feature enabled for low paper by ESC c 4).
❏
When an error has occurred.
XON/XOFF transmission timing
When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows.
(
*
1) XON is not transmitted when the receive buffer is full.
(
*
2) XOFF is not transmitted when the receive buffer is full.
NOTE: The XON code is 11H and the XOFF code is 13H.
Printer status
DIP SW 1-8 status
ON
OFF
XON
transmission
• When the printer goes on line after turning power on or after
reset using the interface.
• When the receive buffer is released from the buffer full state.
• When the printer switches from off line to on line (*1).
• When the printer recovers from an error through a command.
Transmission
Transmission
----
----
Transmission
Transmission
Transmission
Transmission
Transmission
Transmission
XOFF
transmission
• During an error condition.
• When the receive buffer becomes full (*2).
Transmission
----
Transmission
Transmission
Serial interface connection example
NOTES:
❏
Set handshaking so that transmitted data can be received.
❏
Transmit data to the printer after turning on the power and initializing the printer.
Host
Printer
TXD
DSR
CTS
RXD
DTR
FG
SG
RXD
DTR
RTS
TXD
DSR
FG
SG
— 15 —
Summary of Contents for UP-250
Page 1: ...EXTERNAL PRINTER FEB 2000 MODEL UP 250 without price TECHNICAL MANUAL ...
Page 95: ... 86 END END Yes No Action 4 Replace main PCB Replace printer OK Action 4 mechanism assembly ...
Page 136: ... 127 ...
Page 149: ... 140 Main Circuit Board Parts Layout ...
Page 150: ... 141 RS 232 Serial Interface Circuit Board Parts Layout ...
Page 151: ... 142 IEEE 1284 Parallel Interface Circuit Board Parts Layout ...
Page 152: ...RS 485 Serial Interface Circuit Board Parts Layout 143 ...
Page 160: ... 151 Case Unit Lubrication Points Diagram 4 G 31 4 G 31 3 G 31 3 G 31 ...
Page 163: ... 154 EXPLODED DIAGRAM FOR TM U200B U210B NO 1 ...
Page 164: ... 155 EXPLODED DIAGRAM FOR TM U200B U200PB U210B U210PB NO 2 ...