Beginners’ manual Series xx7│Document 26/835; Version E 2│22.04.2005
Saia-Burgess
Controls AG
Confi guring the CPU
Configuring I/O modules with the I/O Builder
3-5
3
Where DB-Flash memory functionality is also used, the following should be noted: the
larger the configured S7 code memory, the smaller the available DB flash memory.
i
Further information on memory settings can be found in manual “26/797 Integrated
system functions Series xx7”, section 5 “Memory” and section 8.2 “Memory scaling”.
Compiler priority
With PCDs with an integrated compiler, an attempt is made at every Stop-Run
transition to translate the whole STEP
®
7 program. As pre-set, components will be
translated in the following sequence:
●
FCs in descending order,
●
FBs in descending order,
●
OBs in descending order,
●
SFCs in descending order (PCD3.M5x47 OEM only),
●
SFBs in descending order (PCD3.M5x47 OEM only).
Where not all components can be compiled, the Compiler Priority field can be used
to define a different sequence. If there is still space in the compiler memory after
prioritized compilation, further components will be translated in the pre-set sequence.
Parameter
:
Component type.
‘*’ All components of the given type will be prioritized for
compilation in ascending order. (Reverse of pre-set order)
‘-’ Component range: If the higher component number is given
first, the range will be compiled in descending order.
i
Further information on compiler priorities can be found in manual “26/797 Integrated
system functions Series xx7”, section 8.3 “Priorities for compiling”.
