CBM-290/291 User’s Manual

7.3 Date configuration

1 Start bit

2 Data bit (+ parity bit)

3 Stop bit ( 1 or more )

(1)Start Bit

In 1/2 bit from the mark-to-space starting edge, state is read once again. When "space" state is confirmed, it is recognized as the start bit. If it is "mark" state, it is not taken as the start bit. Without taking it as an error, detection of a start bit is carried out once again.

(2)Data Bit + Parity Bit

Data bit and parity bit are sampled at 1/2 start bit for time length equal to 1 bit. The state thus sampled is taken as the data for the bit concerned. Bits are named as Bit 0, Bit 1, ..... parity bit counted from the one close to the start bit.

(3)Stop Bit

The stop bit is a mark level of 1 bit or more. With "space" having been detected on detection of a stop bit, framing error takes place.

7.4Error detection

Parity, framing, and overrun are detected. On detection of any error, the data are stored in the buffer as "?".

(1)Framing Error

With "space" state having been detected on detection of a stop bit, error takes place. The data are stored in the buffer as "?".

(2)Parity Error

With an error having been detected under specifying parity check, the data is stored in the buffer as "?".

(3)Overrun Error

On detection of an overrun error, the data are stored in the buffer as "?".

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CITIZEN

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Citizen Systems 291, CBM-290 user manual Date configuration, Error detection
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291, CBM-290 specifications

Citizen Systems CBM-290 and CBM-291 printers are renowned for their reliability and performance in the realm of POS (Point of Sale) printing. Designed specifically for retail and hospitality environments, these thermal printers are equipped with advanced technologies that ensure efficiency and high-quality output.

One of the standout features of the CBM-290 series is their exceptional speed. Both models are capable of printing at speeds of up to 200 mm per second, significantly reducing transaction times. This fast output is crucial in busy settings, where every second counts during customer service. Additionally, they offer high-resolution printing, producing clear and sharp receipts with 203 dpi, which enhances the readability of printed text and barcodes.

The CBM-290 and CBM-291 are designed with versatility in mind. Both models support various media types, including paper rolls, and are compatible with standard POS applications. Their ability to handle different paper widths makes them suitable for diverse printing needs, allowing businesses to customize their receipt formats without constraints.

User-friendliness is another core characteristic of these printers. The CBM-290 series includes features such as an easy paper-loading mechanism that minimizes downtime during paper changes. The printers come with a built-in power supply unit, streamlining setup and reducing clutter, making them ideal for space-constrained retail environments.

Connectivity is paramount in modern POS systems, and both the CBM-290 and CBM-291 offer a range of connectivity options. They support USB, Serial, and Ethernet connections, providing flexibility in how they integrate with existing systems. The CBM-291 takes this a step further by incorporating Bluetooth connectivity, which enables wireless printing capabilities, enhancing operational convenience.

Durability is a key aspect of the CBM-290 series. Built to withstand the rigors of daily use, these printers feature a rugged design that ensures longevity and reliability. This reliability is vital in minimizing maintenance costs and maximizing uptime, which is essential for any business reliant on consistent transaction processing.

In summary, the Citizen Systems CBM-290 and CBM-291 thermal printers are exemplary products in the POS printing market. Their combination of speed, quality, versatility, and durability makes them an excellent choice for retailers and hospitality businesses aiming to enhance their service efficiency while maintaining high standards of quality in their printed materials.
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