Epson TM-T81 - Page 24

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REVISION
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TM-T81
Specification
(STANDARD)
A
2.1.1.5 Serial interface connection example
Host side Printer side
(DTE ex.8251)
TXD .................................. RXD
DSR.................................. DTR
CTS.................................. RTS
RXD.................................. TXD
DTR.................................. DSR
FG .................................... FG
SG.................................... SG
NOTES: 1. Set the handshaking so that the transmit data can be received.
(DTE: Data Terminal Equipment) (DCE: Data Circuit Terminating Equipment)
2. Transmit data to the printer after turning on the power and initializing the printer.
2.1.1.6 Notes on setting DIP switch 2-1 to ON
1) The printer mechanism stops but does not become busy when: an error has occurred, the cover is
open, printing stops due to a paper-end, or paper is fed using the paper feed button.
2) When setting DIP switch 2-1 to ON to enable handshaking with the printer, be sure to check the
printer status using the GS a command and the ASB function. In this setting, the default value of
n for GS a is 2. The printer automatically transmits the printer status, depending on online/offline
changes.
3) When using DLE EOT, DLE ENQ, and DLE DC4 be sure that the receive buffer does not become
full.
• When using a host that cannot transmit data when the printer is busy:
If an error has occurred, DLE EOT, DLE ENQ, and DLE DC4 cannot be used when the
printer is busy due to a receive buffer-full state.
• When using a host that can transmit data when the printer is busy:
When the receive buffer becomes full while transmitting bit-image data, DLE EOT, DLE ENQ
or DLE DC4 used while sending the bit-image data is processed as bit-image data. The
data transmitted when the receive buffer is full may be lost.
Example: Check the printer status using GS r after transmitting each line of data and use
the 4 KB receive buffer. Transmit one line of data so that the receive buffer
does not become full.