Technical data

3.5.3
Supplementary Operations
You can use the supplementary operations set on the programmer
only in function blocks (FB and FX). This means that the total
operations set for function blocks consists of the basic operations and
the supplementary operations.
The system operations also belong to the supplementary functions.
You can use the system operations, for example to overwrite the
memory at optional locations or to change the contents of the working
registers of the CPU.
If you intend to use system operations, you should be familiar with
Chapter 9 "Memory access".
Caution
Only experienced system programmers should use the system
operations and then only with caution.
You can only write operations in function blocks in STL. You cannot
program function blocks in graphic form (LAD and CSF methods of
representation).
This section describes the supplementary operations and covers possible
combinations of substitution operations with actual operands.
System operations System operations are marked in the first column of the
tables with
S
3
Supplementary Operations
CPU 928B Programming Guide
C79000-B8576-C898-01
3 - 49