Ieee 1284 Bidirectional Parallel Interface - PRINTEX P250 Manual

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Table Of Contents

Table of Contents

DTR

Data Terminal Ready

GND

Ground

DSR

Data Set Ready

RTS

Request To Send

CTS

Clear To Send

Ring Indicator

DIP Switch 1-3 is ON

1) When the printer occure error, open the cover, when out of paper or feed paper, the printer only

stop working but not busy status.

2) When DIP Switch is ON and handshaking signal is effective, check the printer status by GS a and ASB

command. In this status, the default of GS a parameter n is 2. The printer transmit the printer status

automatically, it decided by online/offline status.

3) When use DLE EOT, should be confirm that the receive buffer area is not full enough.

•

For example, when the printer is busy, the host can not transmit the data:

When receive buffer area full to make printer busy, if occur error, can not use DLE EOT

•

If the printer is busy, the host can transmit the data:

When transmite bit image data, if receive buffer area full and process bit image date that transmit DLE

EOT at the same time that will be as bit image data.

When receive buffer area full, maybe lose the data if transmit.

For example: When use 4KB receive buffer area, after transmitting each lie data, check theprinter status by GS r

1. Transmit one line data to make the receive buffer is not full enough.

2.1.2

IEEE 1284 Bidirectional Parallel Interface

2.1.2.1

Specifications

Data Transmission:

8-bit parallel

Synchronization:

Externally supplied nStrobe signals

Handshaking:

nAck and busy signals

Signal Level:

TTL compatible

Connector :

ADS-B36BLFDR176 (Honda) or equivalent (IEEE 1284 Type B)

Switching between online and offline

The printer is not equipped with any online/offline switch. The printer is placed into offline status in

either of the followings:

When the power is turened on or until the printer becomes ready for data transmission

afterit is initialized by the reset signal (nlnit) from the interface.

During the self-test.

When the cover is open.

During paper feeding using the paper fedd button.

When the printer stops printing due to a paper-end(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

PRINTEX P250 User Manual

DTR