SIMATIC powerrate производства Siemens

• Identification of energy-intensive equipment and processes to develop measures for improving energy efficiency.
• Comparison of consumption profiles for more efficient processes.
• Optimization of the company according to energy parameters, based on an evaluation of consumption and costs.
• Compliance with the contractually agreed power limits, thus preventing higher power supply costs or penalty payments.
• Integration of the SENTRON PAC3200/4200 Power Monitoring Devices for a clear overview of selected measured values and alarms.
• Integration of switches with an overview of the switch status and the switching possibilities.
• Accurate assignment and comparison of the consumption data of specific work processes or batches

SIMATIC WinCC powerrate comprises the following components:

• Blocks for acquiring and conditioning energy data
• Faceplates for displaying and editing energy data
• Blocks for implementing load management (calculating the trend, monitoring the limit, releasing/inhibiting loads), batch-related consumption recording and for integrating measuring instruments and switches
• Additional blocks – for example, for time synchronization, data backup, data exchange with archives
• Faceplates for displaying results and entering values (e.g. for configuration, or manually measured values)
• Excel-based reports for allocating energy data to cost centers, for batch-related evaluation and for determining and displaying the load duration curve
• Exporting data to Excel

Acquiring and conditioning energy data

Using ready-to-use function blocks, energy data can be acquired by any PROFIBUS-capable devices. The data can be input to the function blocks in the form of counter pulses, count values or power values. Count values can also be entered manually.

From this data, the function block calculates the power averages and the work values for a predefined period. This calculated data is subsequently saved in the WinCC archive. In addition, a final value forecast is extrapolated for the power values for each period.

A sample function (heat calculation) that can be adapted to the needs of the customer at any time by means of open interfaces has been implemented for the purpose of visualizing customized calculations.

Data from manually read counters can be entered directly into the system and used for further analysis. Absolute numerical values (entry of an absolute value instead of the difference from the previous value) can also be recorded and used in further processing.

Presentation of the energy data

The up-to-date, acquired energy data is displayed as power averages/work values for each time interval (total value for the previous interval, current value of the current interval, extrapolated value for the end of the current interval). Load curve display enables analysis of archived energy data as well as its tabular representation.

Further processing of the data

The archived data can be exported to Excel directly from WinCC using the export functions. The exported energy data can also be included in further customized processing. WinCC tools can be used to access the data from the WinCC archive.

Reports

For this purpose, selected energy data is read from archives (Tag Logging archive, user archives) from the WinCC Runtime database; using Microsoft Excel the following reports can then be generated:

• Cost center report
  Here the consumption can be allocated to different cost centers and the costs can be calculated on the basis of predefined tariffs. The results can be output by means of 2 reports in the form of tables or diagrams.
• Load duration curve
  An analysis is carried out on the basis of the archived power averages to establish how often a certain power average has occurred in a given period. It can be quickly detected from this characteristic curve whether temporary power peaks exist which can represent a possible starting point for cost savings by means of load management.
• Batch report
  This is used to allocate consumption to batches, whereby the data can be presented in chronological order or in order of batch name.

The generation of exports or reports can be activated manually or automatically time-controlled (daily, weekly or monthly). Data access and report generation can also take place via a separate "office" PC; which enables the WinCC installation and the "office" applications to be distributed across different PCs.

Load management

Contractually agreed power limits (in the case of electricity, normally the 15-minute average power value) must be observed, otherwise significantly higher supply prices or even penalty payments may become due to the energy supply company. The load management feature of SIMATIC WinCC powerrate carries out cyclic trend calculations in order to issue warnings/alarms if violation of the limit is likely and to switch off loads in accordance with the given configuration should this be required. If a limit is exceeded despite this, the latest load management data is archived to enable future evaluation or analysis.

To prevent unnecessary switching operations, numerous parameters are available for adapting the load management to the current process conditions - and all this can be done easily and conveniently via the faceplate.

For loads that are distributed over different PLCs, SIMATIC WinCC powerrate contains appropriate PLC-to-PLC communication blocks which can be used to integrate these loads into the load management system. Load management is scalable, according to the maximum number of loads to be integrated or monitored, for up to 10, 25, 50, 75 or 100 loads. Load management can be performed for different media (e.g. electricity, gas) simultaneously.

Batch-related consumption recording

A batch comprises all the units of a product that have been produced in one production cycle, i.e. under identical conditions. Batch-related consumption recording allows accurate recording of energy consumption for each batch. Batch-related consumption recording is possible for five types of energy each with up to 10 loads. Appropriate reports can be generated for analysis of the data (see also the batch report).

Integration of SENTRON PAC3200/PAC4200

When the SENTRON PAC3200/PAC4200 Power Monitoring Devices are integrated via DPV1 communication, selected measured values can be displayed and alarms (current, voltage, pulse frequency too high) can be generated from the digital status information and displayed.

Integration of switches

Switch integration via digital inputs/outputs (DI/DO) supports display of the switch status (On, Off, tripped, unplugged).

With the appropriate authorization, switching is also possible via the faceplate. Switching takes place in a 2-step operation (switch command is issued, followed by a prompt for repeated confirmation; the switch command is not forwarded to the switch until confirmation has been received).

WinCC Web Navigator support

Makes the powerrate functionality available over the Web.

Additional functions

To avoid data loss in the event of a communication fault, the data is stored temporarily in a circulating buffer on the S7.

Further information can be found on the Internet at:

http://www.siemens.com/simatic-powerrate

Important information on the use of SIMATIC powerrate is available on the Internet at:

http://support.automation.siemens.com/WW/view/en/48204134/133200