Power Automation System(PAS) -III

  • SICAM PQS UI – Configuration
  • Configuration view-

Application for device

A least one device is required for fault location. Ensure to the order that SICAM PQS can communicate with the devices, you must insert the following elements in this view:

  1. Application E.G- SIEMENS R Master, SIEMENS r Client
  2. an interface
  3. a device

For other devices, such as SIPROTEC protection devices, you must insert and configure the corresponding applications.

Applications for fault location

To execute the fault location function, you must insert and configure the following applications:

  1. PQS automatic fault location
  2. Archive
  3. PQS automatic import if fault records are to be imported

Topology view

The Topology view is subdivided into the 3 categories:

  1. Assignments
  2. Properties
  3. Global line overview
  • Templates view

For more detailed information on how to proceed in the Templates view

In the Templates view, you can view, edit import and export device templates. The device template describes a device’s scope of performance & volume of information.

For some devices, suitable device templates exist. Alternatively, you can edit these templates and customize them according to the requirements of the individual device. In addition, you can import your own device templates or device templates from third-party manufacturers.

The parameterization of the measuring groups is a prerequisite for fault location. The equipment measuring for a bay (feeder) is combined to a measuring group. A SIPROTEC protection device is represented by a measuring group; for SIMEAS R, several measuring groups can exist.

  • SICAM PAS UI – Operation

SICAM PAS UI – Operation provides you with an overview of the runtime status of your station. The configuration is displayed in the tree structure. The different colors show the status of interfaces, devices, or other applications.

In the Status data area, you can:

• Activate the component selected in the tree structure

• Deactivate the component selected in the tree structure

• Set a bay block

• Set a telecontrol block

• Update device information

In redundant systems, you can see which component is active in the Redundancy state data area. In this area,

you can also switch over components, for example, interfaces. In the Errors data area, the diagnostic function provides useful notes on sources of error, which might have caused a pending fault. Potential causes include communication faults or missing licenses. For the interpretation of these notes, it is essential to consider the current operating state of your system.

  • PAS UI – Operation

SICAM PQS UI – Operation is a runtime component of SICAM PQS. It allows you to activate/deactivate individual

components such as interfaces, services or devices, to define/remove bay and tele-control blocks and to update device information. Furthermore, it provides you with an overview of the status of your plant sections.

  1. For automatic fault location, the Archive and PQS automatic fault location services must have been


  1. For communication with the SIMEAS R device, the SIMEAS R Master application must have been started; for communication with SIPROTEC devices, the corresponding protocol is required.
  2. For the automatic import of fault records from devices which are not connected to SICAM PQS via a standard

protocol, the PQS automatic import service must have been started.

  • Complementing the Fault Location Topology

To map your system’s topological structure, open the Topology view in SICAM PQS. For more detailed information on how to define the topological configuration.

  • Select the Properties tab in the Topology view.

A station, a voltage level and a bay have been created. This is enough for single-ended fault location. For two ended fault location, as second station with a voltage level and a bay must be created.

  • SICAM PAS Value Viewer

Value Viewer is an important tool for the project phases of configuration, testing, commissioning,

and operation. Without any additional configuration expenditure, it allows the visualization of process and system information and informs you about the current status of your station. In addition to checks in the monitoring direction, information can be manually updated and the command direction can be tested. Command outputs are secured by passwords.

  • SICAM PAS User Administration

Through the User Administration tool, you can assign passwords in order to define which persons can access

individual working areas and functions.

A user can log in with one of the following user roles:

Administrator with full rights

System engineer with full rights apart from access rights

Data engineer with full rights for SICAM PAS UI – Configuration

Switch operators with full rights for SICAM PAS UI – Operation and Value Viewer and read-only rights for SICAM PAS UI – Configuration

Guest with read-only rights for SICAM PAS UI – Operation and SICAM PAS UI – Configuration

For access authorization, you can either use Windows access rights or define your own SICAM PAS access rights. The type of User Administration can be modified, but you can only work with one type of access rights at the same time.

If you are working in secured data transmission mode based on the DNP 3.0i protocol, you enter the Private Shared Key of the certificate used and also the DNP 3.0-User ID for each user.

When defining the parameters for the DNP 3.0i interface to the control center, you assign a user as default user in the Configuration view.

Afterwards, in the Mapping view, you can assign each item of information in the command direction a user with the required switching authorization.

The User Administration can be shown or hidden.

Users must log on while the User Administration view is shown. Their logon applies to all system components, such as SICAM PAS UI – Configuration, SICAM PAS UI – Operation, or SICAM PAS Value Viewer.

All activities, such as the user logons and logoffs or the creation of new users, are stored in a security log file.

In addition, the logon processes for protocols with TLS encryption (DNP 3.0i Master, DNP 3.0i Slave, IEC 60870-5-104 Master, and IEC 60870-5-104 Slave) and the authentication processes for DNP 3.0i Slave are stored in this file.

  • Redundancy – Overview

In complex systems such as power distribution systems, the failure of individual devices can cause unpredictable

problems in operating processes. You can set up redundant SICAM PAS systems in order to minimize the risk of failure in your stations.

The term redundancy designates the existence of functionally identical resources if these are not required for trouble-free operation. In SICAM PAS, redundancy designates the existence of:

• 2 identically configured SICAM PAS systems

• Several communication paths between the SICAM PAS systems and the devices

• Redundantly set up devices

  • Hot Standby

Depending on the protocol, hot standby is supported for redundancy. If a device operates in hot standby mode, the interface which controls the process has a complete process image of the device and can immediately take over the control of the device concerned. With all other protocols, a general interrogation must be performed first in order to ensure that the interface has a process image.

  • Understanding Redundancy in SICAM PAS

In a SICAM PAS system, redundancy can be set up on different levels:

• System redundancy

The term system redundancy designates the existence of 2 Full Servers with identical functions (including DIPs). One of the systems is the primary system and the other is the secondary system. If the primary system (or parts thereof) fails, the secondary system takes over control.

  • Interface redundancy

Interface redundancy supports the communication with other SICAM PAS components via redundant communication links. If for example, the SICAM PAS system cannot contact a device via the primary interface, the system switches over to the secondary interface.

  • Device redundancy

The term device redundancy designates that devices are designed redundantly (for example, 2 identical bay controllers for the same primary process). The process can still be monitored and controlled even if one device or the communication link to a device fails.

  • Operating Redundancy

If redundancy has been set up in a SICAM PAS system, you can view the status of a redundant SICAM PAS system or of redundant interfaces in SICAM PAS – UI Operation. In addition, you can switch over redundant systems and redundant interfaces: If this happens, the secondary system or the secondary interface becomes active.

  • Operating modes of Redundant Interfaces

Depending on the protocol implementation in SICAM PAS, different communication modes exist:

  • Active mode

The active Master controls the devices, receives messages from the device and forwards them to higher level


  • Standby mode

Master computers in standby mode actively communicate with the devices. In the same way as active Masters, they receive messages from the device, maintain their own process image of the device and can initiate general interrogations. They do not send commands and do not forward received information to higher-level applications.

  • Passive mode

Master computers in passive mode listen to the communication between the active application and the device without transmitting data. They do not maintain their own process image of the device. They do not start general interrogations, do not forward received information to higher-level applications and do not send commands to substations.

  • Inactive mode

Inactive Master computers do not receive data from the devices. They do not maintain a process image of the device.

Related Posts

Leave a comment

You must be logged in to post a comment.