Siemens Welding System ST PCS 7 User Manual

Operation and monitoring via Web

Siemens ST PCS 7 · November 2007

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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.

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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.

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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-

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.

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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.

INTERNET

Modem 

OS-LAN  
(terminal bus) 

Plant bus 

LAN intranet 

© Siemens AG 2007