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Table 2.1.1 TM-T88IIIPrinter Status and Signals (Continued)

Pin

Signal

Signal

Function

number

name

direction

 

 

 

 

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

 

Printer status

DIP SW 2-1 status

 

ON

OFF

 

 

XON

When the printer goes online after turning on the power (or

Transmit

Transmit

transmission

reset using interface)

Transmit

Transmit

 

When the receive buffer is released from the buffer full state

 

When the printer switches from offline to online

Transmit

 

When the printer recovers from an error using the

Transmit

 

DLE ENQ 1 or DLE ENQ 2 commands

 

Transmit

XOFF

When the receive buffer becomes full

Transmit

Transmission

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 , XON is not transmitted when the receive buffer is full.

In case , XOFF is not transmitted when the receive buffer is full.

TITLE

TM-T88IIIseries

SHEET

NO.

REVISION

 

EPSON Specification (STANDARD)

B

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SHEET

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Image 23
Epson T88III specifications 1.4 XON/XOFF transmit timing, 2 XON/XOFF Transmit Timing, DLE ENQ 1 or DLE ENQ 2 commands