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Glossary-2

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

The bit result is the link between bit and word-oriented processing. This is an

efficient method to allow the binary interpretation of the result of a word

instruction and to include it in a series of logic operations.

All blocks must be called first before they can be processed. The sequence

and nesting of these calls within an organized block is called the call

hierarchy.

Specific graphic source file created with the programming language CFC

(Continuous Function Chart).

The CC 1 and CC 0 bits (condition codes) provide information on the

following results or bits:

S Result of a math operation

S Result of a comparison

S Result of a digital operation

S Bits that have been shifted out by a shift or rotate command

Folder of the user interface of the SIMATIC Manager which can be opened

and can hold other folders and objects.

A CPU (central processing unit) is the central module in a programmable

controller in which the user program is stored and processed. It consists of an

operating system, processing unit, and communication interfaces.

Characteristics of the Ladder Logic representation type. Current paths

contain contacts and coils. Complex elements (e.g. math functions) can also

be inserted into current paths in the form of “boxes”. Current paths are

connected to power rails.

Bit Result (BR)

Call Hierarchy

Chart

Condition Codes

CC 1 and CC 0

Container

CPU

Current Path

Glossary

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Siemens NAN 67 Series Wartungshandbuch Seite 296