SP91 User Manual
4 DTR Data Terminal Ready 20 DTR Data Terminal Ready
5 GND Ground 7 GND Ground
6 DSR Data Set Ready 6 DSR Data Set Ready
7 RTS Request To Send 4 RTS Request To Send
8 CTS Clear To Send 5 CTS Clear To Send
9 RI Ring Indicator 22 RI 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
2.1.2
2.1.2
2.1.2 IEEE
IEEE
IEEE
IEEE 1284
1284
1284
1284 Bidirectional
Bidirectional
Bidirectional
Bidirectional Parallel
Parallel
Parallel
Parallel Interface
Interface
Interface
Interface
2.1.2.1
2.1.2.1
2.1.2.1
2.1.2.1 Specifications
Specifications
Specifications
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 ：
1) 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.
2) During the self-test.
3) When the cover is open.
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