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Standalone systems can benefit from remote access.  

• Remote Engineering and technical support

• Remote Data Access by accounting, scheduling, and MES systems

• Inexpensive multiple display (2nd, 3rd, 4th et al)

• Wireless PDA for roaming in the field

• Evening, weekend or emergency access

Standalone PC with remote dial up access
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 (Internet Explorer 6.0 or 7.0).

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).

Standalone PC with configuration tool on Laptop

The Laptop has the Project Node software installed as the configuration tool. The laptop contains the database and all graphic source files.  Changes to the Graphics and the Database can be done on the laptop even if disconnected from SCADA node.  No changes to SCADA node can be made without the laptop.

On the laptop, a web browser must be installed to use for the configuration tool (Project Manager).  Peer Web Services or IIS must also be installed as part of the configuration tool.  Both will need a network card in order to download changes to the SCADA node.  A cross-link cable and Ethernet network cards provide an easy interface.

ViewDAQ provides operators and general users on the SCADA node to VIEW and Control real-time data and full-animation graphics without a web browser.  Displays Groups are another feature available to ViewDAQ users (but not browser clients).

Engineers and technicians would use a web browser to configure the database and build graphics on the Laptop. There is a local version of the Graphics builder on the Project node (laptop) named DrawDAQ, to allow users to build graphics without a web browser.