Siemens SIMATIC PCS 7 Configuration Manual page 162

Configuring AS functions
8.1 Principles
PCS 7 features channel blocks for the actual signal and diagnostic blocks for diagnosing the
subnet, racks, and modules. The channel blocks must be configured in CFC.
Define symbolic names for each channel in the hardware configuration (e.g. H4711GO).
Linking a driver block to this symbolic name assigns this I/O signal to the signal driver.
The diagnostic blocks are automatically created by the system in the charts (@Charts) when
the CFC charts are compiled.
Parameters are already assigned automatically to the diagnostic blocks in accordance with
the settings made in the hardware configuration.
If an entire ET 200M fails, for example, a process control message is provided pointing to the
faulty ET 200M. The individual process control messages of the modules and their channels
are automatically suppressed. This prevents a message burst from occurring, thus making
troubleshooting easier. The relevant technological messages continue to be evaluated.
Note
The diagnostic blocks from the charts (@Charts) are described in the "SIMATIC process
control system PCS 7 Basis Library"
109738089) manual in the "Family: @System" section.
The channel blocks of the PCS 7 Advanced Process Library are described in the "SIMATIC
process control system PCS 7 Advanced Process Library"
support.industry.siemens.com/cs/ww/en/view/109482346) manual in the "Channel Blocks"
section.
The channel blocks of the PCS 7 Library V7.1 are described in the "SIMATIC process control
system PCS 7 Standard Library"
36201733) function manual in the "Family: DRIVER" section.
Diagnostic block "CPU_RT"
In PCS 7 V7.0 and above the "CPU_RT" diagnostic block is inserted with "Generate module
drivers" in the @CPU_RT chart. Channel/diagnostic blocks in PCS 7 Library V7.0 and above
must be used for this.
The "CPU_RT" diagnostic block implements a new controller and cycle behavior in the
overload range. All automation systems have the new behavior in the overload range.
A performance analysis of the AS load is also possible. The performance analysis depends
on the CPU firmware (CPU FW V4.5 and above). If the CPU FW supports SFC 78, the
performance data can be read via "CPU_RT". The performance data is shown in the diagnostic
area of PCS 7 asset management (see also the "Integrated asset management (Page 293)"
section).
Note
You can find additional information on "CPU_RT" in the "Family: @System" section of the
"SIMATIC Process Control System PCS 7 Basic Library"
support.industry.siemens.com/cs/ww/en/view/109738089) manual.
162
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Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA
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