Epson TM U200D - B/W Dot-matrix Printer, Technical Manual

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Rev. B Features and General Specifications 1-17
TM-U200D/U200PD Technical Manual
NOTES:
❏
When the remaining space in the receive buffer is 16 bytes, the printer becomes buffer-full. This status continues
until the space in the receive buffer increases to 32 bytes.
❏
The printer ignores the data received when the remaining space in the receive buffer is 0 bytes.
On-line/Off-line switching
The printer does not have an on-line/off-line button. The printer goes off-line under the
following conditions:
❏
Between the time when the 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 due to a paper-end and when the on-line
recovery wait time finishes after loading paper (in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt feature set enabled due to paper shortage by ESC c 4).
❏
When an error has occurred.
XON/XOFF transmit 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 <11>H and the XOFF code is <13>H.
Printer status
DIP SW 1-8 status
ON OFF
XON
transmission
• When the printer goes on line after turning on the power or
reset using 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
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Transmission
Transmission
Transmission
Transmission
Transmission
Transmission
XOFF
transmission • During an error condition
• When the receive buffer becomes full (*2). Transmission
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Transmission
Transmission