Siemens ST PCS 7 manual Operation and monitoring via Web, Simatic PCS 7 Web server

© Siemens AG 2007

Operator system

Operation and monitoring via Web

SIMATIC PCS 7 Web server

■Overview ■Design

SIMATIC PCS 7

Web clients

Modem

INTERNET LAN intranet

Web server in a

SIMATIC PCS 7 client

OS-LAN (terminal bus)

Plant bus

The SIMATIC PCS 7 Web server can be used to operate and monitor a system via intranet/Internet. The SIMATIC PCS 7 Web server uses the mechanisms of a multi-client for accessing the subordinate OS servers, and makes the project data globally available via intranet/Internet. The project-specific process data in the SIMATIC PCS 7 Web server are accessed via Web clients which are equipped with Internet Explorer.

■Application

A differentiation is basically made between the following types of application when operating and monitoring SIMATIC PCS 7 sys- tems via the Web:

•Standard:

Up to 50 Web clients access the data of one SIMATIC PCS 7 Web server over intranet/Internet.

•Diagnostics:

One or only a few Web clients have access to several SIMATIC PCS 7 Web servers/single-user systems for remote operation, diagnostics or monitoring.

The products offered in the context of SIMATIC PCS 7 for opera- tion and monitoring via Web permit cost-optimized solutions for both types of task:

• Server-based licensing is recommended for the "Standard" type of application. In this case, each SIMATIC PCS 7 Web server requires a SIMATIC PCS 7 Web Server license which in- cludes the simultaneous access of 3, 10, 25 or 50 Web clients. Licenses are not installed on the Web clients themselves.

• Diagnostics licenses are tailored for such types of application.
The SIMATIC PCS 7 Web Diagnostics license available for the
Web diagnostics client allows the latter access to the as-	5
signed SIMATIC PCS 7 Web diagnostics servers/single-user

systems at all times. On the server side, a SIMATIC PCS 7 Web Diagnostics Server license or SIMATIC PCS 7 Web Server license is required per SIMATIC PCS 7 Web server/ single-user system. Since there are no functional differences between the license-free Web client and the Web client with SIMATIC PCS 7 Web Diagnostics license, mixed operation is possible.

The SIMATIC PCS 7 OS server with the Microsoft Windows Server 2003 operating system offered in Chapter "SIMATIC PCS

7 Industrial Workstation" in the Section "System-neutral compo- nents" can be used as the basic hardware for the SIMATIC PCS 7 Web server. The OS Software server of the SIMATIC PCS 7 V7.0 process control system is preinstalled on this basic device in ad- dition to the operating system. In order to configure the SIMATIC PCS 7 Web server, you require the license "OS Software Client" in addition to the SIMATIC PCS 7 Web Server license or SIMATIC PCS 7 Web Diagnostics Server license. Deviating from the specification in the ordering data, the license of the OS Software Client in this special application is enabled for the Microsoft Windows Server 2003 operating system.

■Function

The Web clients equipped with Internet Explorer and with plug- ins installable via the World Wide Web access the project data provided by the SIMATIC PCS 7 Web server via intranet/Internet. The process displays are converted by "Publishing" into a form suitable for presentation by the Internet Explorer.

A plant can be operated and monitored via the Web clients in the same manner as via the OS clients. The user must log on with the Web client just as with an OS client, and the rules for assignment of privileges are also identical. The input operations made on the Web clients are recorded in the OS operating log.

The integral OS user management guarantees high security when accessing the OS servers from the SIMATIC PCS 7 Web server. In line with the security requirements of the respective system, access protection is possible using password, firewall technology and individual security strategies.

Siemens ST PCS 7 · November 2007

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