Appendix C— Communications Reference

Communications Protocols

Communications protocols are important because they determine the transmission standards for communication between the printer and the host. The printer and the host must use the same protocol and parameters to communicate properly. The printer supports the flow control and block transfer protocols described in the next sections. All of these protocols are point-to-point except Multi-Drop. Application programs and/or ROM BIOS determine which protocols your computer can support. For more detailed information, refer to the Intermec Data Communications Reference Manual (P/N 044737).

Intermec Standard Protocol

Intermec Standard protocol is a proprietary block transfer/status response protocol. For each block sent, the host must wait for the appropriate response before sending the next block (<DC1>). Except for single character status commands (<ENQ> and <VT>), Standard protocol transmits characters in message blocks beginning with the start of text (<STX>) character and ending with the end of text (<ETX>) character. Message blocks can be up to 255 characters, including the start of text and end of text characters. The printer auto-discriminates between Standard, Polling Mode D, and Multi-Drop protocols.

The printer returns its highest priority status when it receives a valid block (<STX> data <ETX>) or when it receives the status request command <ENQ>. When the printer receives the status dump command (<VT>), the printer returns all active status. The printer status response time ranges from 30ms to 100ms depending on the complexity of the received message block. In the case of a transmission error, the printer responds with a <NAK> and discards the entire message block.

The next table shows printer status conditions in descending order of priority, status response characters, and pin 11/20 states.

Intermec Standard Protocol Printer Status Conditions

Printer Status

Character

Pin 11/20

Buffer already full

GS

Busy

 

 

 

Ribbon fault

US

Busy

No label stock

EM

Busy

 

 

 

Buffer now full

DC3

Busy

Printhead hot

SI

Busy

 

 

 

Offline (paused)

DC3

Busy

Label at strip pin

FS

Ready

 

 

 

Skipping

DC1

Ready

 

 

 

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EasyCoder 3400e Bar Code Label Printer User’s Manual

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Genicom 3400e user manual Communications Protocols, Intermec Standard Protocol Printer Status Conditions

3400e specifications

The Genicom 3400e is a robust and versatile printer designed primarily for high-volume environments, where efficiency and reliability are paramount. As part of the Genicom family of printers, the 3400e offers a range of features and technologies that cater to the needs of various industries, including corporate offices, logistics, and educational institutions.

One of the standout features of the Genicom 3400e is its impressive printing speed. Capable of producing up to 1,200 pages per hour, this printer significantly reduces wait times and enhances productivity. This speed is complemented by its advanced printing technology, which ensures high-quality output with sharp text and crisp graphics, making it suitable for printing documents ranging from simple reports to detailed presentations.

The Genicom 3400e employs dot matrix printing technology, recognized for its durability and low operational costs. Unlike laser printers that use toner, dot matrix printers utilize ink ribbons. This not only reduces the cost per page but also offers long-lasting performance for continuous printing tasks. The 3400e’s design incorporates a robust print head that can withstand rigorous use, making it an ideal choice for heavy-duty applications.

In terms of connectivity, the Genicom 3400e supports various interfaces, including parallel, serial, and USB, ensuring compatibility with numerous devices and systems. This flexibility allows businesses to integrate the printer into their existing setups without hassle. Moreover, it supports multiple paper sizes and types, enabling users to print invoices, labels, and reports seamlessly.

Another notable characteristic of the Genicom 3400e is its user-friendly interface. The printer is designed with ease of operation in mind, featuring intuitive controls and an LCD display that provides real-time information about the printer status, helping operators manage tasks efficiently.

Additionally, the printer boasts reliable performance with reduced downtime, thanks to its capability for continuous operation. Its sturdy construction and easy-to-replace components make maintenance straightforward, ensuring that businesses can rely on the Genicom 3400e for their printing needs without interruptions.

In summary, the Genicom 3400e is a powerful dot matrix printer that excels in high-volume printing scenarios, combining speed, reliability, and affordability. Its advanced features and user-centric design make it an excellent choice for organizations seeking efficient printing solutions that stand the test of time.