Chapter 7: Programming Guide 7-85
Status Commands
Status Command Introduction
The 7158 has three methods of providing status to the application.
These methods are through Batch Status Commands, Real Time Status
Commands, and Auto Status Back. An application may use one or
more of these methods to understand the current status of the printer.
A brief description of each of these methods follows.
Batch Status Commands
– These commands are sent to the printer and
stored in the printer’s buffer. Once the printer has processed all the
previous commands these commands are processed and the proper
status is returned to the application. In the event a condition causes the
printer to go BUSY, it stops processing commands from the printer
buffer. If a Batch Status Command remained in the buffer during this
busy condition, it would not be processed. In fact, no Batch Commands
are processed while the printer is in this state.
Real-Time Commands
– These commands are sent to the printer and
are NOT stored in the printer’s buffer. Instead, they are acted on
immediately (regardless of the printer’s BUSY status) and their
response (if any) is returned to the application. This gives the
application the ability to query the printer when it is in a busy state in
order to correct whatever fault has occurred.
Auto Status Back
– This mechanism allows the application developer
to program the printer to automatically respond with a four byte status
when certain conditions in the printer change.
Please see the subsequent sections for a more detailed description of
these status commands. At the end of this Status Commands section is
a page entitled “Recognizing Data from the Printer”. This describes
how to interpret what command or setting (in the case of Auto Status
Back) triggered a response from the printer.
Summary of Contents for 7158
Page 1: ...NCR 7158 Thermal Receipt and Impact Printer Release 1 0 Owner s Guide B005 0000 1112 Issue D...
Page 26: ...1 8 Chapter 1 About the Printer...
Page 50: ...3 12 Chapter 3 Using the Printer Clearing Check Flip Paper Jams Check Check Flip Window Door...
Page 110: ...5 28 Chapter 5 Technical Specifications Code Page 437...
Page 111: ...Chapter 5 Technical Specifications 5 29 Code Page 850...
Page 112: ...5 30 Chapter 5 Technical Specifications Code Page 852...
Page 113: ...Chapter 5 Technical Specifications 5 31 Code Page 858...
Page 114: ...5 32 Chapter 5 Technical Specifications Code Page 860...
Page 115: ...Chapter 5 Technical Specifications 5 33 Code Page 863...
Page 116: ...5 34 Chapter 5 Technical Specifications Code Page 865...
Page 117: ...Chapter 5 Technical Specifications 5 35 Code Page 866...
Page 128: ...6 10 Chapter 6 Communication Interface...
Page 286: ...7 158 Chapter 7 Programming Guide...
Page 314: ...Index 8 W Weight of printer 5 36 X XON XOFF protocol 6 6...