User Memory Management - Siemens SIMATIC S5 Series Manual

User Memory Management

The management of the user memory is already optimized on a PG
supplied with STEP 5.
If you install STEP 5 later or if you change the configuration of
your system or load other drivers or programs, it may be necessary
to change the assignment of the user memory to avoid errors.
This chapter describes the structure of the user memory and the
standard assignment and explains how to change the assignment.
Working with S5-DOS/ST
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