Specifications

01.99 12 Abbreviations / Glossary

SINUMERIK 840C, OEM Version for Windows (BA)

12-13

User program

User programs for the PLC in the 840 C are written in the STEP 5

programming language. The user program is of modular structure and consists

of various blocks.

The fundamental block types are:

Program blocks (OBs, PBs, FBs, FXs, SBs): these blockss contain the STEP 5

commands

Data blocks (DBs, DXs): these blocks contain constants and variables for the

STEP 5 program.

Vocabulary words

Words used in a programming language with defined notation and meaning

Words with defined notation within initialisation files. The values assigned to

the various vocabulary words are used as initialisation parameters for the

associated application.

Workpiece

• Part to be made or machined by the machine tool.

• A workpiece is the name given to a directory in which programs and other

data such as main programs, initialisation file, tool offsets (see data

structure description) are stored. The workpieces are in turn stored in a

directory.

Workpiece contour

Desired contour of the workpiece to be made/machined.

Workpiece

coordinate system

The workpiece coordinate system has its origin in the workpiece zero point.

When programming in the workpiece coordinate system, dimensions and

directions refer to this system.

Workpiece zero

The workpiece zero (workpiece zero point, workpiece datum) represents the

origin for the workpiece coordinate system. It is defined by distances to the

machine zero.

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