90 Chapter 5: Programming commands

Preferred implementation

For a new application the GS (1D) sequences are recommended to avoid possible misinterpretation of a DLE (0x10) sequence as a clear printer (0x10 0, ASCII DLE NUL) command.

An application using these GS (1D) sequences, does not need to distinguish for the printer between the new real time commands and the clear printer command. This implementation is ideal for an existing A756 application that already uses the clear printer command or for a new application being developed.

Alternate implementation

The alternate implementation uses the DLE (0x10) sequences as implemented on other printers. An application using these DLE (0x10) sequences and the original A756 clear printer command (0x10) must distinguish for the printer between the new real time commands and the clear printer command by adding a NUL (0x00) to the clear printer command.

An application using these DLE (0x10) sequences must also send the second byte of the sequence within 100 milliseconds of the first, to prevent the first byte being mistaken for a clear printer command.

Rules for using real-time commands

Three situations must be understood when using real time commands.

First, the printer executes the real time command within a few msec of detecting it in the input buffer and will transmit status regardless of the condition of the DSR signal.

Second, the printer transmits status whenever it recognizes a real time status transmission command sequence, even if that sequence happens to occur naturally within the data of another command, such as graphics data.

In this case the sequence will also be handled correctly as the graphics data it is intended to be when the graphics command is executed from the buffer.

Third, care must be taken not to insert a real time command into the data sequence of another command that consists of two or more bytes.

In this case the printer will use the real time command sequence bytes instead of the other command’s parameter bytes when finally executing that other command from the buffer; the other command will NOT be executed correctly.

These three situations generally preclude use of standard DOS drivers for the serial communication ports when using real time commands.

Moving data through the buffer

Applications should not let the buffer fill up with real time commands when the printer is busy at the RS-232C interface. A busy condition at the RS-232C interface can be determined by bit 3 of the response to 1D 05, or 1D 04 1, or 10 04 1. The reason for a particular busy condition can be determined by other responses to 1D 04 n or 10 04 n.

Although the printer responds to real time commands when it is busy, it will place them into the buffer behind any other data there, and flush them out in the order in which they were received. When the printer is busy due simply to buffer full (that is, it can’t print data as fast as it can receive it), then data continues to be processed out of the buffer at approximately print speed and the real time commands will eventually get flushed out.

When the printer is busy due to an error condition, then data stops being processed to the buffer until the condition clears one way or another. In either case, but more quickly in the case of an error condition, the buffer can fill with real time commands.

When the DLE (0×10) sequences are being used, the last byte stored when the buffer fills up could be the DLE (0×10) code, with no room for the subsequent EOT or ENQ. When this lone DLE (0x10) byte is finally processed out of the buffer it will be interpreted as a clear printer command.

Similarly, when the GS (1D) sequences are being used, the last byte stored when the buffer fills up could be the GS (1D) code, with no room for the subsequent EOT or ETX or ENQ. When this lone GS (1D) byte is finally processed out of the buffer it will use the next byte, whatever it is, as the second byte in its GS (1D) sequence.

Continued . . .

A776 (B780) Programming Guide

A776-PG00001 C 12/09

Page 102
Image 102
Cognitive Solutions B780, A776 manual Preferred implementation, Alternate implementation, Rules for using real-time commands

B780, A776 specifications

Cognitive Solutions A776 is an advanced technology platform designed to enhance decision-making processes through the application of artificial intelligence and cognitive computing. This state-of-the-art solution seamlessly integrates multiple technologies to optimize business operations and drive innovation across various sectors, including finance, healthcare, and manufacturing.

One of the main features of A776 is its robust data processing capabilities. Leveraging powerful machine learning algorithms, the platform can analyze vast amounts of data in real-time, identifying patterns and insights that would otherwise be overlooked. This enables organizations to make informed decisions based on actionable intelligence, significantly improving efficiency and productivity.

Another key characteristic of the A776 system is its natural language processing (NLP) capability. This feature allows the platform to understand and interpret human language, making it easier for users to interact with the system and obtain valuable insights. By integrating NLP, Cognitive Solutions A776 can provide intuitive user experiences, enabling workforce members to query data using everyday language rather than complex coding skills.

The A776 is also built on a flexible architecture that supports seamless integration with existing IT ecosystems. This interoperability allows organizations to harness their current data sources while taking advantage of the innovative features offered by A776. The platform’s API support enables smooth connections with third-party tools, enhancing collaboration and expanding its range of applications.

Security is a major focus of the Cognitive Solutions A776. The platform is equipped with advanced encryption protocols and compliance measures to ensure that sensitive data is protected against breaches and unauthorized access. This commitment to security helps businesses maintain customer trust and safeguard their competitive advantage.

Scalability is another defining feature of the A776. As businesses grow and evolve, the platform can be easily adapted to meet changing demands. Whether a small startup or a large enterprise, organizations can scale their cognitive solutions according to their operational needs.

Furthermore, the Cognitive Solutions A776 is designed with user accessibility in mind. The interface features customizable dashboards that provide a clear overview of insights and performance metrics, enabling users at all levels to harness the power of cognitive computing without requiring extensive training or technical expertise.

In conclusion, Cognitive Solutions A776 is a cutting-edge platform that offers a range of features, including advanced data processing, natural language processing, robust security measures, and user-friendly design. Its flexible architecture allows it to integrate seamlessly with existing systems, making it an indispensable tool for organizations looking to leverage artificial intelligence in their decision-making processes.