Configuring The F-Cpu - Siemens SINAMICS S120 Manual

4.7

Configuring the F-CPU

A standard program is not required for this application example, as the drives are
exclusively controlled via BICO interconnections in SINAMICS. For most
applications in practice, a program – which is independent of the safety program –
is expected here, which is based on a standard telegram.
In this example, in OB1 only the required enables are defined in the control word.
In this example, the safety program in the F-CPU is processed in fail-safe function
block FB1 . A simplified program sequence has been selected to illustrate how the
functions work. Complex safety logic and boundary conditions for creating the
safety program are covered in the Distributed Safety manuals.
The safety program for this function example has been consciously made
NOTICE
as simple as possible, and coordinated to run on the safety demonstration
case.
It is not permissible that the program is used in this form for a real
application.
You start with the F call block. This is required to call the safety program. For this
purpose, a function (in this case, FC1) must be inserted in the block folder in the F
call programming language. Cyclic interrupt OB35 is required to cyclically call the
safety program.
In this example, the actual safety program is executed in a function block (here,
FB1), this means that only FB1 must now be inserted using the F-LAD or F-FBD
programming language.
Table 4-6: Configuring the F-CPU
No. Action
OB1
1.
Permanently writing all enables
to the control word
Address 256 was specified by
the telegram configuration.
Corresponds to the start
address of "Standard
telegram 1".
The address can be taken from
HW Config or the telegram
configuration of the drive.
(see Table 4-5, No. 2. and
No. 3)
PROFIsafe SLS Override
Version 1.0, Entry ID: 81682475
4 Configuration and project engineering
Remark
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