Firmware Structure And Data Flow - Siemens CP-8000 User Manual

2.3

Firmware Structure and Data Flow

The basis for CP-8000/CP-802x is a modular, open, and thus non-technology-dependent sys-
tem architecture for processing, communication, and peripherals (single-processor system,
firmware).
The adaptation to the specific needs of the application is accomplished by relying on an indi-
vidual hardware configuration and by loading standard firmware and parameters. The parame-
ters influence, within their defined limits, not only the behavior of the firmware functions, but
also that of the hardware functions. As a result, mechanical parameterizations such as the
changing of jumpers or loads are no longer necessary on any of the module types. This per-
mits not only online reconfiguration but also the gapless documentation of set parameters by
the engineering system, as well as simplified inventory management.
Due to the different requirements in terms of functionality, also different data flow concepts are
produced:
·
Telecontrol
For telecontrol tasks and the distribution of user data in networked plants, the use of spon-
taneous transmission proves advantageous for optimizing the utilization of the in many
cases limited communication bandwidth. This helps avoid constant burdening of the data
sinks with unnecessary data.
·
Automation
For the implementation of a freely definable open-/closed-loop control function a determinis-
tic guaranteed reaction time is needed. This is achieved by using the consistently periodic
concept with regard to data acquisition, execution of functions, and data transfer, regard-
less of the number of changing signals.
As interface to the process serve the integrated I/O Modules. The input/output and processing
of the process signals is performed by means of the I/O Master Module.
Internal Data Flow
Communication
interfaces
Communication
Open-/closed loop
control function
spontaneous data
SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual
DC8-037-2.02, Edition 10.2017
Master Module
System Services
Telecontrol
I/O Master Module
Preprocessing /
postprocessing
Automation
periodical data
Unrestricted
System Overview
Acquisition /
output
I/O bus
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