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6-6
Chapter 6: Communication Interface
[DTR SPACE] - When ready to accept data.
- Remaining space in the 4K buffer rises above 512 bytes. **
[XON sent]
- When ready to accept data after power on.
- Remaining space in the 4K buffer rises above 512 bytes. **
[XOFF sent] - In an error state.
- Remaining space in the 4K buffer falls below 256 bytes*
* - 10 bytes in line mode.
** - 20 bytes in line mode.
Sending data (status):
In DTR/DSR mode, data is sent only when DSR is SPACE.
In XON/XOFF mode, DSR state is ignored.
XON/XOFF Protocol
The XON/XOFF characters coordinate the information transfer
between the printer and the host computer. The printer sends an XON
character when it is ready to receive data and it sends an XOFF
character when it cannot accept any more data. The software on the
host computer must monitor the communication link as shown in the
following flowchart in order to send data at the appropriate times.
If XON/XOFF has been selected, the printer also toggles the DTR
signal, as described in the next section, but it does not look at the DSR
signal to transmit data.
Host Flow Control Diagram
Содержание 7158
Страница 1: ...NCR 7158 Thermal Receipt and Impact Printer Release 1 0 Owner s Guide B005 0000 1112 Issue D...
Страница 26: ...1 8 Chapter 1 About the Printer...
Страница 50: ...3 12 Chapter 3 Using the Printer Clearing Check Flip Paper Jams Check Check Flip Window Door...
Страница 53: ...Chapter 3 Using the Printer 3 15 Configuration Menu and Print Test samples show approximately 60 of size...
Страница 56: ...3 18 Chapter 3 Using the Printer 1 Set DIP Switch 1 to On Front of Printer Reset Button Front Cover...
Страница 110: ...5 28 Chapter 5 Technical Specifications Code Page 437...
Страница 111: ...Chapter 5 Technical Specifications 5 29 Code Page 850...
Страница 112: ...5 30 Chapter 5 Technical Specifications Code Page 852...
Страница 113: ...Chapter 5 Technical Specifications 5 31 Code Page 858...
Страница 114: ...5 32 Chapter 5 Technical Specifications Code Page 860...
Страница 115: ...Chapter 5 Technical Specifications 5 33 Code Page 863...
Страница 116: ...5 34 Chapter 5 Technical Specifications Code Page 865...
Страница 117: ...Chapter 5 Technical Specifications 5 35 Code Page 866...
Страница 128: ...6 10 Chapter 6 Communication Interface...
Страница 286: ...7 158 Chapter 7 Programming Guide...
Страница 314: ...Index 8 W Weight of printer 5 36 X XON XOFF protocol 6 6...