Siemens SINUMERIK 840Di Function Manual page 2026

Basic machine

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Operating mode of control (block sequence mode per DIN): Operating mode for NC systems

in which a → subprogram is selected and executed continuously.

Auxiliary functions

Auxiliary functions enable part programs to transfer → parameters to the → PLC, which then

trigger reactions defined by the machine manufacturer.

CNC axes are classified based on their function as follows:

• Axes: interpolating path axes

• Auxiliary axes: non-interpolating infeed and positioning axes with axis-specific feed.

Axis address

See → Axis identifier

Axis identifier

Axes are identifed using X, Y, and Z as defined in DIN 66217 for a right-handed, right-angled

→ coordinate system.

→ Rotary axes rotating around X, Y, and Z are identified using A, B, and C. Additional axes

situated parallel to the specified axes can be designated using other letters.

See → Axis identifier

Backlash compensation

Compensation for a mechanical machine backlash, e.g., backlash on reversal for ball

screws. The backlash compensation can be entered separately for each axis.

Backup battery

A backup battery ensures that the → user program is stored retentively in the → CPU along

with specified data areas and bit memory, timers, and counters.

Auxiliary axes are not involved in actual machining, e.g., tool feeder, tool magazine.

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

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