Siemens SIMATIC PCS 7 Manuale di istruzioni per l'uso - Pagina 9
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Overview
Add 7 product line
The Add 7 product line offers add-on products for the cost-effective implementation of
demanding or specific requirements that are derived from process control and automation
technology.
The Front End Module "AddFEM SoE" of the Add 7 product family is tailored to the special
applications in the field of power plant and process control technology at which the high-
precision time-based acquisition of signal changes of the inputs is required. These include,
for example, the archiving of operating states of a power plant for incident analysis or for
general logging.
A diverse range of technical combinations is possible with AddFEM SoE. The Front End
Module can be used together with SIMATIC S7 systems as well as with the SPPA-T3000
system. The AddFEM SoE is controlled by the higher-level automation processor, for
example SPPA-T3000, via the PROFIBUS DP bus system.
These products are based on extensive experience in process control and with the current
system generation 7 of the Siemens automation range "Totally Integrated Automation".
PROFIBUS DP connection
The AddFEM SoE has two PROFIBUS DP interfaces DP A and DP B that operate in parallel.
This allows redundant communications media to be connected. In principle, the process
input information is passed in parallel through both PROFIBUS DP interfaces. However,
events are only reported via the active PROFIBUS DP interface.
By contrast, only the process output information of the active PROFIBUS DP interface is
passed to the outputs. The process output information of the passive PROFIBUS DP
interface is analyzed for monitoring purposes.
The master-reserve status of the two PROFIBUS DP interfaces, i.e. which PROFIBUS DP
interface is active or passive with regard to the output information, can be specified through
the automation processor.
Time resolution
Digital signals are time-stamped with a real-time resolution of 1 millisecond.
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AddFEM Sequence of Event
Operating Instructions, 03/2016, A5E00075541X-06
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