Siemens ET 7Y Series Spezifikationen Seite 193

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Glossary-1
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
Glossary
Address
An address is the designation for a certain address ID or address area (e.g. input
I 12.1; memory word MW 25; data block DB 3).
AKKU
The accumulators are registers in the ³ CPU that act as an intermediate
memory for loading and transfer operations as well as comparison, calculation
and conversion operations.
Automation System
An automation system is a programmable logic controller that consists of at least
one CPU, various input and output modules and human-machine interfaces.
Backup Memory
The backup memory ensures that the memory areas of the ³ CPU that do not
have a buffer battery are buffered. A parameterizable number of times, counters,
markers and data bytes is buffered.
Bus
A bus is the common transmission route to which all nodes are connected; has
two defined ends.
In the case of the ET 200S, the bus is a two-wire or fiber-optic cable.
Compression
The programming device online function Compress is used to align all valid
blocks contiguously in the RAM of the CPU at the start of the user memory. This
eliminates gaps that occur when blocks are deleted or corrected.
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