Entries Into The Processing Table - Lenze 9300 Manual

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Configuration
7.4.5

Entries into the processing table

The 93XX controller provides a certain time for calculating the processing time of FBs. Since the type
and number of FBs to be used depends on the application and can vary strongly, not all available
FBs are permanently calculated. A processing table is therefore provided under code C0465, where
only the FBs used are listed. This means that the drive system is perfectly matched to the task. If
further function blocks are integrated into an existing configuration, these must be listed in the
processing table.
Several aspects must be observed:
The number of FBs to be processed is limited
A maximum of 50 FBs can be integrated into a configuration. Every FB requires a certain processing
time.Code C0466 displays the residual time for the processing of FBs. If this time has elapsed no
further FBs can be integrated.
Entry sequence into the FBs
Normally, the entry sequence under C0465 is arbitrary, but it may be important for applications with
high response. In general, the most favourable sequence is adapted to the signal flow.
Example:
E1
E2
E3
E4
E5
Fig. 7-5 Example of a configuration
Struction of the processing table for the configuration example in Fig. 7-5:
1. DIGIN need not to be entered into the processing table.
2. First FB is AND1, since it gets its input signals from DIGIN and is only connected to
successors.
3. Second FB is OR1, since its signal source is the output of AND1 (predecessor). The output
signal in AND1 must be generated before being processed in OR1. At the same time OR1 has
a successor. OR1 must therefore be entered into the processing table before its successor.
4. Third FB is AND2, since it has a predecessor (see 3.)
7-14
DIGIN
SHB9300CRV EN
AND1
&
OR1
≥1
AND2
&
2.0
DIGOUT
A1
A2
A3
A4