WebAccess SCADA Node - Web enabled SCADA software for industrial.

WebAccess SCADA Node SCADA software for industrial control systems and building automation.
WebAccess supplies communications drivers that enable personal computers to communicate with automation hardware including programmable logic controllers (PLC), loop controllers, direct digital control systems (DDC), distributed control systems (DCS) and IO (Input / Output) systems. The SCADA Node communicates in real-time with automation equipment and control system hardware via Serial, Ethernet or proprietary communications.

figure 1 Example Network drawing of automation system using 3 SCADA nodes and 4 Web Browser Clients on a Local SCADA Node, Laptop, PC and Pocket PC.
The SCADA Node also has a network connection to Clients. The SCADA node is not a web server (usually). The SCADA Node retransmits data between the automation hardware and clients. In a sense, the SCADA node is a "SCADA Server". WebAccess comes with "built-in" device drivers to communicate with automation devices from Allen-Bradley, GE, Modicon, Siemens and others. (See the Genuine WebAccess Driver List). The SCADA node can be a Blind node or have its own Local Interface (called ViewDAQ). There can be an unlimited number of SCADA Nodes in the system. The Complete SCADA solution Out of the box, WebAccess provides a complete Supervisory Control and Data Acquisition system: Alarm Handling Package, including: Global Alarm Summary Page showing alarms from all tags on all SCADA nodes in the System, Alarm filtering, Sorting and Prioritizing, Alarm Logs to printer, local hard drive, Alarm Log Display and Central ODBC database, Each Tag has a High-High, High, Low, Low-Low, Deviation and Rate of Change Alarms, Text-to-Speech Alarm annunciation reads the Alarm, Value and Description (no pre-recordings!) Email, pager and voice notification of alarms are standard features in WebAccess not found in most SCADA software packages. Real-time and Historical Trending Data Logging and Reports Recipe Handler (to change hundreds of setpoints, and control setting with button) Scheduler used to schedule setpoint changes and equipment Area of Responsibility Security - where users security level changes for different "Areas" of the plant or facility Operator Action Log Communications Status Display System Log Global Tag Browser Built-in Point Detail and Block Detail Displays to allow users to "drill down" to get more information about a Tag Scheduled Reports (Shift, Daily and Monthly) can be viewed as HTML, are emailed automatically and formatted to copy-n-paste into EXCEL, WORD, etc. Redundant SCADA Nodes A Redundant SCADA node consists of primary and backup SCADA nodes, each with SCADA node software, license control file and Hardkey installed. The Project Manager will download an identical run-time database to both primary and backup SCADA nodes (assuming both are on-line). The Primary and backup will communicate with each other when the kernel is started, but only one will communicate to automation hardware. If the Primary fails, the Backup will begin communications to the automation devices. The Web Browser clients will be redirected to the backup if the primary node fails. The redundant SCADA node requires the purchase of two SCADA node licenses. Redundant Comport A Redundant Comport consists of primary and backup communications Ports on the SCADA node. This enables a redundant communications path to the automation Device (e.g. PLC or Controller). If communications can not be established through this Comport, WebAccess will try a second Comport, specified as the Backup Port. You configure the backup Port number in WebAccess, but without any devices on it. Usually the device must have two comports also. Not all Device Types support a backup Port. The Backup Port is usually configured as the same type. However, some Device Types allow the backup port to be another physical type; for example a Modicon Modbus RTU protocol device can use a TCP/IP (network) port as a backup port to a Serial Port.

figure 2 Example drawing of automation system using 1 SCADA node and a remote Web Browser Client.
Standalone SCADA Node This standalone PC would have both the SCADA node software and the Project Node software installed on the SCADA node PC. The remote client would only need a web browser. A modem would allow remote engineering support and remote access to real-time data using a web browser. Or remote users might use it to read real-time data or respond to alarms or remote control actions. The modem must support a TCP/IP protocol connection. The standard RAS (Remote Access Service) in Microsoft windows would allow the SCADA node to answer calls and provide the TCP/IP link without a 3^rd party service (ISP). Alternatively, the modem could also be a permanent network connection like DSL or ISDN through an ISP (Internet Service Provider). Click here for more "standalone architectures".
WebAccess Configure, Build and Administer Software Remotely The unique feature, which distinguishes WebAccess from the competition, is that all engineering, database configuration, graphics building and software administration can be performed using a standard web browser as well. This makes WebAccess a "fully" web-based solution. WebAccess enables engineers, integrators and vendors with the ability to support their systems remotely over an intranet or the Internet using an ordinary web browser.
WebAccess is available in multiple languages including English, French, Japanese, Korean, simplified Chinese and traditional Chinese. Client The WebAccess Client plug-in is available for desktop computers, and laptops running Microsoft Windows CE, 98, 2000, XP (Home and Professional), Server 2003 and Vista (including Home, Business and Ultimate versions) using Internet Explorer 5.5 and later. Internet Explorer 6.0 and 7.0 support all features of the WebAccess client plug-in. The Client provides full-animation graphics and dynamically updated real-time data. Thin Client Interface The WebAccess Thin Client Interface requires no additional software. Intended for PDA and Pocket PC, any ASP enabled web browser can view the Thin Client Graphics including computers running Microsoft Windows CE, 95 98, ME, 2000, 2003, XP, Vista and Internet Explorer. SCADA The WebAccess SCADA node software is available for desktop computers, and laptops running Microsoft Windows CE, 2000, Server 2003, XP Professional and Vista (Business and Ultimate Versions). PROJECT NODE - CONFIGURATION TOOL AND DATABASE SERVER The WebAccess PROJECT Node software is available for desktop computers, and laptops running Microsoft Windows 2000, Server 2003, XP Professional and Vista (Business and Ultimate Versions).
Note 1 - XP Home is supported only as a Client. Note 2 - Windows CE Client has limited functionality (no scripts or video) and is designed for specific hardware. Contact your local sales office for more information. Note 3- Windows Vista running on some hardware platforms (for example single core INTEL and AMD) do not support Video, Tools, Reports and web browser controls inside a graphic display. It appears most Dual Core INTEL and AMD PCs produced after 2006 do support all features in the WebAccess Client using Vista. It is recommended to test an Vista based PC before using it as a WebAccess Client if you plan to use Video, Tools, Reports, Logs or any Web control inside a graphic display

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