Glossary - Siemens SIMATIC S7-400 Hardware And Installation Manual
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- Reference manual (472 pages) ,
- Installation manual (316 pages) ,
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Glossary
A
Accumulator
The accumulators are registers in the CPU and are a buffer for load,
(ACCU)
transfer and comparison, math and conversion instructions.
An address is the identifier for a specific area of memory on which an
Address
instruction acts.
Examples: Input I 12.1; Memory Word MW24; Data Block DB3.
Analog Module
Analog modules convert analog process variables (for example,
temperature) into digital values that can be processed in the CPU or
they convert digital values into analog manipulated variables.
Application
Application modules are function modules from the M7 range.
Module
The ATM 478 AT adapter module provides a slot for a short AT card.
AT Adapter Module
B
Backup Battery
The backup battery ensures that the user program in the CPU is not
lost in the event of a power failure and that defined data areas, bit
memory, timers, and counters are also retained.
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
Glossary-1
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