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gert
Member 3
Joined: 02 Jan 2015
Posts: 645
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 Posted: 24/01/2015 17:52 Post subject: Performance Data-Establishing OPC response time |
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Determining the transmission times for typical configurations between S7 stations and PC stations via via SIMATIC NET OPC server
Automation projects often require intensive data exchange between SIMATIC S7 controllers and PC systems. On the PC the standardized OPC server has long been established as a central communication component within the PLC world. The OPC server of SIMATIC NET controls many protocols, interfaces and communication paths. To be able to make the right selections in the concept phase of an automation project, it is important to be able to assess the communication performance of a planned configuration.
Important questions in this context are listed below:
Which S7 components are best suited for the planned automation project?
Which data transfer times are expected for typical configurations and systems?
Which statistical fluctuations can occur?
How does the data communication affect the cycle (OB1) of an S7 controller?
How do the various OPC interfaces differ respectively?
The figure below illustrates the problem:
To answer the questions above measurements with typical, practice-relevant configurations with SIMATIC components were performed:
with typical S7 components (controllers) and industrial PCs
with typical parameters and configurations
Load programs with practical relevance in the corresponding S7 controllers enable values under real conditions
The focus of this measurement is on the measurement of the runtime of a message frame through the entire system. This means from the S7 station via the SIMATIC NET OPC server to the OPC client application!
Outputs on the user interface
You can enter the desired configuration quickly and easily with an interactive user interface. The corresponding performance data is available immediately in the output table.
https://www.automation.siemens.com/perfdata/perfdata.aspx?version=24&lang=en |
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