Axis Exclusively Controlled From The Plc - Siemens SINUMERIK 840D sl Function Manual

Extended functions

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N031 X100 F500

N040 M3 S500

If the spindle (axis B) is traversed immediately after block N023 as a PLC axis to 180° and

back to 1°, and then again to the neutral axis, block N040 does not trigger a preprocessing

stop nor a reorganization.

Special case: Axis replacement with preprocessing stop

Without a GET or GETD instruction having previously occurred in the main run, the spindle or

the axis can be made available again by RELEASE (axis) or WAITP (axis), for example. A

subsequent GET leads to a GET with a preprocessing stop.

Axis exclusively controlled from the PLC

After the control boots, the axis is in the "neutral axis" state. The PLC controls it. To traverse

the axis as competing positioning axis (from the PLC via function block FC18), the axis must

first be explicitly requested from the PLC.

Per machine data, the axis interchange to the PLC can be exclusively restricted to PLC

controlled axes: MD10722 $MN_AXCHANGE_MASK, Bit 3 = 1

The axis cannot be traversed from an NC part program.

Parameter assignment

Parameterizing an axis as axis that is exclusively controlled from the PLC is realized using the

axis-specific machine data:

MD30460 $MA_BASE_FUNCTION_MASK, Bit 4 = 1

Control by PLC

The traversing behavior of an axis exclusively controlled from the PLC is only influenced by

the axial NC/PLC interface signals:

● DB31, ... DBX28.1 (reset)

● DB31, ... DBX28.2 (continue)

● DB31, ... DBX28.6 (stop along braking ramp)

Extended Functions

Function Manual, 10/2015, 6FC5397-1BP40-5BA3

K5: Channel synchronization, axis interchange

6.2 Axis replacement

Sinumerik 828d