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You can protect function blocks (FBs) and functions (FCs) against unauthorized access
using the S7 Block Privacy application. You can no longer edit protected blocks in STEP 7.
Only the interfaces of the blocks are then visible.
You can load selective configuration changes online to the corresponding system
components. This can result in extended loading and startup times.
Continuous Function Chart (CFC)
The CFC editor is the tool for graphical configuration and commissioning. You use the CFC
editor to place and interconnect instances of function block types and assign their
parameters. In addition, the CFC editor is the tool for loading user programs.
The CFC editor supports the following types of standardized software modules:
● Function block type
● Process tag type
● Control module type
Sequential Function Chart (SFC)
The SFC editor is the tool for the graphical configuration and commissioning of sequential
control systems for batch production processes. You use a sequential control system to
control and process basic automation functions created in CFC by means of operating mode
and system status changes. Depending on the subsequent use, you create the sequential
control systems either as a SFC chart or SFC type.
SFC chart
You use an SFC chart to implement a single-use sequential control system that controls
multiple sub-areas of a production plant. Each SFC plan contains standardized inputs and
outputs for status information and for control by the user program or the user. You can place
and interconnect the SFC chart in the CFC as a block.
SFC type
SFC types are standardized multi-use sequential control systems that control one sub-area
of the production plant. You can select the SFC types from a catalog and then place and
interconnect them and assign their parameters as an instance in a CFC. An SFC type may
contain up to 32 sequencers.
Organization blocks, system functions, system and standard function blocks
Organization blocks (OB), system functions (SFC), and system and standard function blocks
(SFB) are integrated in the operating system of the CPU. The PCS 7 blocks are called in the
OBs. PCS 7 blocks can call SFCs or SFBs or form interfaces to SFCs and SFBs.
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Introduction to CPU 410-5H
2.9 PCS 7 project
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