A794 Owner’s Guide | Chapter 6: Programming Information |
Status Commands
Status Command Introduction
The A794 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.
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.
Batch Mode
For
When a fault occurs, the printer will go busy at the
December 1999 | 101 |