Siemens ST PCS 7 manual OS hardware, Single-user system OS single station

© Siemens AG 2007

Operator system

OS hardware

Introduction

■Overview ■Design

5

All operator stations are based on modern SIMATIC PCS 7 in- dustrial workstations optimized for use as OS single station, OS client or OS server. The SIMATIC PCS 7 industrial worksta- tions are characterized by powerful PC technology combined with the Microsoft Windows XP Professional or Server 2003 op- erating system. They can be used in harsh industrial environ- ments or also in offices.

Standard components and interfaces from the PC world offer generous scope for system-, customer- or sector-specific op- tions and expansions.

The connection of as many as 4 process monitors via an optional multi-VGA graphics card in the OS single station or in the OS cli- ent permits the user-friendly control of several plant areas from one operator station.

Single-user system (OS single station)

In a single-user system architecture, all operation and monitor- ing functions for a complete project (plant/unit) are concentrated in one station. A 10/100/1000 Mbit/s Ethernet RJ45 port is al- ready onboard and can be used for connecting to an OS LAN (terminal bus). The OS single station can be linked to the Indus- trial Ethernet plant bus by means of two different network con- nections:

•CP 1613 A2 communications processor,

for communication with max. 64 automation systems

•Standard FastEthernet network card and Basic Communica- tion Ethernet

for communication with max. 8 automation systems (not fault- tolerant systems)

The OS single station can be operated on the plant bus in paral- lel with other single-user systems or with a multi-user system ar- chitecture. Two OS single stations can, however, also be oper- ated redundantly (SIMATIC PCS 7 single station redundancy).

Multi-user system with client/server architecture

Amulti-user system consists of operator terminals (OS clients), which receive data (project data, process values, archives, alarms and messages) from one or more OS servers through an OS LAN (terminal bus). The OS LAN can share the transmission medium with the plant bus or it can be designed as a separate bus (Ethernet with TCP/IP).

Central Archive	OS clients
Server (CAS)	(max. 32 in multi-client mode)
	OS servers
	(max. 12
	redundant)
	Industrial Ethernet
Automation systems

In this architecture, redundant OS servers may be set up to meet higher availability requirements. Critical applications running on the OS server are monitored by Health Check for software faults. If a fault is detected, switchover to the redundant system is trig- gered. Synchronization of the redundant OS servers takes place automatically and at high speed.

OS clients can access the data of not only one OS server/server pair, but from several OS servers/pairs of servers simultaneously (multi-client mode). This makes it possible to divide a plant into technological units and to distribute the data accordingly to sev- eral OS servers/pairs of servers. In addition to scalability, the ad- vantage of distributed systems is the ability to decouple plant ar- eas from each other, which results in higher availability.

5/4

Siemens ST PCS 7 · November 2007