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13 12
TM-T88III series
Specification
(STANDARD)
B
Table 2.1.1 TM-T88III Printer Status and Signals (Continued)
Pin
number
Signal
name
Signal
direction
Function
2) When XON/XOFF control is selected:
The signal indicates whether the printer is correctly connected and
is ready to receive data. SPACE indicates that the printer is ready
to receive data. The signal is always SPACE except in the
following cases:
• During the period from when the power is turned on to when the
printer is ready to receive data
• During the self-test
25 INIT Input Changing the DIP switch setting enables this signal to be used as a
reset signal for the printer.
The printer is reset when the signal remains SPACE for 1 ms or more.
*1 • Definition of “receive buffer full”
• When the receive buffer capacity is specified to 4 KB (DIP SW1-2 is Off):
• If the DIP SW2-5 is off, when the remaining space in the receive buffer drops to 128 bytes,
the printer status becomes “buffer full” and it remains “buffer full” until the space in the
receive buffer increases to 256 bytes.
• If the DIP SW2-5 is on, when the remaining space in the receive buffer drops to 128 bytes,
the printer status becomes “buffer full” and it remains “buffer full” until the space in the
receive buffer increases to 138 bytes.
• When the receive buffer capacity is specified to 45 bytes (DIP SW1-2 is On):
• Regardless of the DIP SW2-5 setting, when the remaining space in the receive buffer drops
to 16 bytes, the printer status becomes “buffer full” and it remains “buffer full” until the space
in the receive buffer increases to 26 bytes.
• The printer ignores the data received when the remaining space in the receive buffer
is 0 bytes.
2.1.1.4 XON/XOFF transmit timing
When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows. Transmit
timing differs depending on the DIP SW2-1 setting.
Table 2.1.2 XON/XOFF Transmit Timing
DIP SW 2-1 status
Printer status
ON OFF
XON
transmission
① When the printer goes online after turning on the power (or
reset using interface)
Transmit Transmit
② When the receive buffer is released from the buffer full state
Transmit Transmit
③ When the printer switches from offline to online
— Transmit
④ When the printer recovers from an error using the
DLE ENQ 1 or DLE ENQ 2 commands
— Transmit
⑤ When the receive buffer becomes full
Transmit Transmit
XOFF
Transmission
⑥ When the printer switches from online to offline
— Transmit
NOTES: • The XON code is <11>H and the XOFF code is <13>H.
• In case
③, XON is not transmitted when the receive buffer is full.
• In case
⑥, XOFF is not transmitted when the receive buffer is full.
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