Tuesday, November 13, 2018 Useful Resources for Industrial Technology Enthusiasts!



  • OPC I/O Servers supports two different methods of obtaining data: Synchronous and Asynchronous I/O.

  • In typical OPC client, this selection updates items at regular intervals.

  • Asynchronous I/O, by comparison, does not enable the OPC Client to poll the server; it provides data between the driver and the OPC server on an exception basis.

  • Using Asynchronous I/O, the server notifies the OPC Client when data has exceeded the user-supplied percent deadband.

  • This architecture offers low communications overhead because the driver does not repeatedly poll for the same data over and over again.

  • Information that is not synchronized to a continuously running clock. With asynchronous transmission, each character begins with a 'start' bit and ends with a 'stop' bit and the clock is only synchronized for the duration of the character.

  • See also Synchronous.

    Find more about    Asynchronous

    Top 20 Industry Tags (Viewed during Last Hour):

    PLC (Programmable Logic Controller) ../ FHSS (Frequency Hopping Spread Spectrum) ../ DSSS (direct sequence spread spectrum) ../ I/O (Input/Output) ../ DTE (Data Terminal Equipment) ../ BPS ../ Full Duplex Repeater ../ Collision ../ Ethernet Encapsulation ../ Synchronous ../ Thermocouple K-Type ../ Bandwidth ../ Modem ../ Spread Spectrum ../ Half Channel ../ GNU - What is GNU? ../ GPS (Global Positioning System) ../ Point-Multipoint ../ Repeater ../ Asynchronous ../ See More..

    << Back


    Site customized for Screen Resolution - 1400 x 1050
    Site Map    I    Copyright © 2018 Automation Media. All rights reserved.