Glossary
Windows Automation Center, WinAC Slot Version 4.0
Hardware Installation and Operating Manual, Edition 02/2006, A5E00273194-02
177
Load memory:
Memory area (RAM) allocated for all of the blocks downloaded from STEP 7
excluding thesymbol table and comments. It is implemented either as a plug-in
memory card or apermanently integrated memory.
Local data:
Local data are temporary data of a block that are stored while the block is being
processed in the L stack but are no longer available after block processing is
complete.
Logic block:
A logic block in SIMATIC S7 is a block which contains a section of the STEP 7user
program (as opposed to a -> data block, which only contains data).
Memory card:
Memory cards are memory media in smart card format for CPUs and CPs. They
are implemented as -> RAM or -> Flash EPROM.
Mode:
The SIMATIC S7 automation systems have the following operating states: STOP,
RESTART, RUN.
Mode switch:
The mode switch is used to set the mode you require on the CPU.
Module parameters:
Module parameters are values that can be used to control the behavior of
themodule. A distinction is made between static and dynamic module parameters.
MPI:
The multipoint interface (MPI) is the programming device interface of SIMATIC S7.
It enables the simultaneous operation of several stations (programming
devices,text displays, operator panels) on one or more CPUs. Each station is
identified bya unique address (MPI address).
Nesting depth:
One block can be called from another by means of a block call. Nesting depth isthe
number of -> logic blocks called at the same time.
