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Entry type: Product note Entry ID: 76797797, Entry date: 07/15/2013

OS Client, Batch Client and Route Control Client with SIMATIC PCS 7 V8.0+SP1 Released for Virtual Operating Environments

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Virtualization permits the implementation of several isolated virtual machines (VM) with own hardware components on one real physical computer (host system). These virtual machines perform like real computers and can each execute applications. OS Clients, Batch Clients and Route Control Clients based on SIMATIC PCS 7 V8.0+SP1 are herewith released for use on virtual machines under VMware ESX V5.0 and V5.1. These client types are thus independent of the real hardware and several clients can be run simultaneously on one common hardware basis.

1 Coverage of the release

In addition to the OS Clients, Batch Clients and Route Control Clients based on SIMATIC PCS 7 V8.0+SP1, the following software components are also released for virtual operation:

  • SIMATIC PCS 7 SFC Visualization
  • SIMATIC PCS 7 Web Server
  • SIMATIC PCS 7 OpenPCS 7/OS Client
  • SIMATIC WinCC Data Monitor
  • SIMATIC PCS 7 Terminal Server

Other software components of the SIMATIC PCS 7 V8.0+SP1 process control system have not been subjected to a test for compatibility on a virtual machine and are therefore not released for this purpose!

For technical reasons the operation of the regional product variant SIMATIC PCS 7 OS Software Client ASIA is not possible on virtual machines.

Irrespective of this release for operation on virtual machines, we consider the use of SIMATIC PCS 7 in real, non-virtual operating environments to be the standard priority. If SIMATIC PCS 7 is employed in a virtual environment and the operating characteristics should deviate from those of the standard operation in a real, non-virtual environment, this will only be documented by means of FAQs.

Important note:

Problems that occur during operation on virtual machines will be corrected by Siemens, if they can be reproduced on the standard runtime environment released for SIMATIC PCS 7 V8.0+SP1 (real, non-virtual operating environment). In other cases it must be assumed that the problem is caused by the virtualization software or the hardware components. In this case Siemens regrets to be unable to correct the problem. Please take this into acount in your system configuration and possibly reach an agreement with the supplier of the hardware components and the virtualization software for suitable support services.

2 Advantages of virtualization

Virtual technologies permit cost-effective, resilient and flexible IT infrastructures, which offer the following advantages:

  • Cost reduction
    • Consolidation of the physical computers, cables, switches, etc.
    • Reduced power consumption
    • Reduction in the required space
    • More cost-effective hardware can be used for clients (so-called ThinClient solutions)
  • Reduction of the time for maintenance and upkeep
    • Time saving due to centrally executed updates and backups
    • Reduced maintenance costs and time due to central administration
    • ESXi Server configuration with remote management tools
  • Increased safety
    • Increased safety due to remote access and centralized computer management
    • Reduced chances of attacks on Thin Clients; central protection on the ESXi server for the virtual machines
  • Increased availability
    • Easy replacement of the virtual machines on the ESXi-server during operation
  • Increased flexibility
    • Hardware independence of the virtual machines
    • Virtual machines with different operating systems on one ESXi-server
    • Additional virtual machines can be added by starting another VMware session.

However, please also take possible negative aspects into account:

  • Significantly increased system complexity
  • More administrative work
  • Possibly increased security expenses (additional layer, data security)
  • Danger of a "Single Point of Failure"
  • Depending on the functional scope there may be additional license costs for virtualization
  • No single-source support

3 Hardware and software requirements

The hardware requirements of VMware ESXi V5.0 or V5.1 are applicable to the host systems. By host system is meant the real hardware, on which the ESXi-server for the virtual machine runs. The host system provides its resources to the virtual machines.

In addition, the instructions and requirements of the following entry ID are applicable:

  • Service Pack 1 for SIMATIC PCS 7 V8.0 (EU), entry ID 67798122

4 Licensing of the SIMATIC Software on virtual machines

There is no difference in the licensing of a SIMATIC PCS 7 software installation on a virtual machine and the installation on a real hardware (SIMATIC PCS 7 Industrial Workstation). Each software installation on a virtual machine, e.g. SIMATIC PCS 7 and other SIMATIC applications, must be licensed.

Each SIMATIC PCS 7 OS Client installation on a virtual machine must be suitably licensed.

5 Project-specific release

On a project-specific basis the following virtual systems can be implemented with SIMATIC PCS 7 Software V8.0+SP1 under VMware ESXi V5.0 and V5.1, in addition to virtual OS Clients, Batch Clients and Route Control Clients:

  • OS Server and OS Single Station
  • Batch Server
  • Route Control Server
  • Engineering System incl. Management Console
  • Maintenance Station
  • Communication to fault-tolerant automation systems (changed on September 17th in 2013: initially only under VMware ESXi V5.0 and only H-CPUs V6.0 and higher)
  • Communication with more than 8 automation systems

A special project release is required in such cases, which necessitates a detailed analysis of the desired configuration based on the technical limiting factors.

The purpose of the project-specific release is to ensure that the necessary hardware and software requirements are met.

When you parametrize a virtual machine please use the hardware recommendations in the readme files of SIMATIC PCS 7 V8.0+SP1 (see entry ID 66807356) as orientation.

It is also possible to monitor all virtual SIMATIC PCS 7 stations via the central administration of the ESXi server.

6 Restrictions / Further Information

  • Only the hardware certified in the VMware Compatibility Guide may be used for the ESXi-Server and its components: http://www.vmware.com/go/hcl;
    communication modules, e.g. CP 1623, multi-monitor graphics cards and signal modules can thus not be employed.
  • The host system must provide sufficient resources to the virtual machines also when there is an increased resource demand.
  • The plant bus communication to the automation system is only via the (virtual) standard network card (BCE coupling).
  • The connection to failsafe automation systems has not been released.
  • The connection between redundant OS servers, Batch servers or Route Control servers must be implemented via an Ethernet connection and separate (virtual) network cards.
  • Virtual SIMATIC PCS 7 stations must be treated like real SIMATIC PCS 7 stations. This means:
    • Firewalls, virus scanners, Application Whitelisting and update mechanisms (patch installation via WSUS) must be integrated and configured like real installations.
    • Pausing of virtual SIMATIC PCS 7 stations is not permitted.
  • No support of VMware options such as vMotion, High Availability (HA) and Fault Tolerance (FT).
  • All operator stations can be operated via a opened Remote Desktop connection. This applies to both a remote desktop connection (Basis Windows Session) and a RealVNC connection (RealVNC Enterprise Edition V4.6.3).
  • A Remote Desktop connection may only be used for OS Clients, Batch Clients and Route Control Clients via /console or /admin. Please read the information in chapter "4.8.2 Functions for remote Diagnostics" of the user manula "PCS 7 - PC Configuration and Authorizations", as well as the latest readme file on SIMATIC PCS 7 V8.0 SP1, chapter "3.4.18 Remote Service and Remote Control" (see entry ID 66807356).
  • Audio signals cannot be transmitted via a RealVNC connection.
  • Operation of a chipcard reader on the Thin Client is not possible.

7 Information sources

Information and instructions on the optimal operation of the VMware is available at:


A summary of the hardware components that have been validated and released for VMware is available at:


Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit