RTOS library supports DAQ cubes - Embedded.com

RTOS library supports DAQ cubes

Canton, Mass.—Supporting recently introduced hardware, United Electronic Industries (UEI) announces the addition of complete QNX RTOS (realtime operating system support for its PowerDNA (Distributed Networked Automation) series of data acquisition and control cubes.

PowerDNA cubes are 4 x 4 x 4-in. or 4 x 4 x 5.8-in. Ethernet -based data acquisition and control devices. Each PowerDNA Cube consists of a core module (with processor and network interface) along with three or six open I/O slots, or layers.

You configure a cube system by selecting appropriate UEI I/O boards. You can choose from analog input boards (with resolutions of 16-bits, 18-bits, or 24-bits, signal input boards (to 100-V or 0-20-mA), and analog output boards (developing up to 40-V). There are also digital I/O, counter/timer, CAN Bus interfaces, multi-port RS-485 and RS-232 serial I/O, and power conversion boards.

Deterministic Timing

Using these and the PowerDNA QNX library, QNX developers can obtain the functions provided by UEI's standard Windows and Linux interfaces, and can also use the deterministic timing afforded by QNX.

The PowerDNA QNX Library can be deployed on any host computer running the QNX RTOS, and connected to a PowerDNA cube over an Ethernet 10/100Base-T connection.

What's more, the library is compatible with all popular versions of QNX, including revisions 4.x and 6.x. In addition to the library, the support package includes example and demonstration programs, as well as documentation.

Three Modes

The QNX library supports three operating modes. In Immediate Mode the host polls data from, or writes data to, the cube in a fully software-controlled manner.

In the DMAP mode the cube acquires data paced by its internal clock, transferring each scan independently over the network to the host. DMAP mode is specifically designed for high speed realtime control applications. A patented protocol guarantees 1000 analog/digital I/O points are updated in less than 1-ms.

Finally, there's a circular buffer mode. In the ACB (Advanced Circular Buffer) mode, the cube acquires data paced by its internal clock, and then transfers it into buffers over the network to the host. This buffer ensures no data is lost during times when the network is busy performing other tasks.


QNX for PowerDNA is priced at $300. The QNX PowerDNA run-time license costs $30 per installation.

For more information contact Bob Judd at United Electronic Industries, 611 Neponset St, Canton, Mass. 02021. Phone: 781-713-0023. Fax: 781-821-2891. E-mail: bjudd@ueidaq.com

United Electronic Industries , 781-713-0023, www.ueidaq.com/products/powerdna/

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