
Rev. A Appendix A-5
TM-T88 Series Technical Manual
Notes on setting DIP switch 2-1 to ON
❏ 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.
❏ 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
on-line/off-line changes.
❏ When using DLE EOT and DLE ENQ, be sure that the receive buffer does not become full.
• When using a host that cannot transmit data when the printer is busy and if an error
occurs, DLE EOT and DLE ENQ 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 and the receive buffer
becomes full while transmitting bit-image data, a DLE EOT or DLE ENQ used while
sending bit-image data is processed as bit-image data, not as a command. Secondly, any
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 4K byte receive buffer. Transmit one line of data so that the receive buffer does not
become full.
RS-485 Serial Interface
Data transmission: Serial
Synchronization: Asynchronous
Handshaking: Depend on the DIP switch settings
(DTR/DSR or XON/XOFF control )
Signal levels: 2.0 V to 5.0 V: Logic 1
0.0 V to 0.8 V: Logic 0
Baud rates: 2400, 4800, 9600, 19200 bps
Data word lengths: 7 or 8 bits
Parity settings: None, even, odd
Stop bits: 1 or more
Connector (printer side): Female D-SUB25 pin connector
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