Feedrate Control; Feedrate Disable And Feedrate/Spindle Stop - Siemens SINUMERIK 840D sl Function Manual

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V1: Feedrates

17.4 Feedrate control

MD22240 $MC_AUXFU_F_SYNC_TYPE (output time of F functions)

The output is suppressed in the default setting (MD22240 = 3), because drops in velocity can

occur through the output of F functions to the NC/PLC interface in continuous-path mode.

For more information, see Description of Functions "H2: Auxiliary function outputs to PLC

(Page 377)".

Reset behavior

The behavior after the end of program or NC reset is specified by the machine data:

MD22410 $MC_F_VALUES_ACTIVE_AFTER_RESET (F function is active even after reset)

Feedrate control

The "Feed disable" or "Feed/spindle stop" brings the axes to a standstill with adherence to the

braking characteristics and the path contour (exception: G33 block).

Channel-specific feedrate disable

The NC/PLC interface signal:

DB21, ... DBX6.0 (feedrate disable)

stops all axes (geometry and auxiliary axes) of a channel in all modes.

Effectiveness of the channel-specific feedrate disable:

● With active G33, G34, G35:

● With active G63:

● With active G331, G332:

"Feed stop" for geometry axes in JOG mode

The NC/PLC interface signals:

DB21, ... DBX12.3 (feed stop for geometry axis 1)

DB21, ... DBX16.3 (feed stop for geometry axis 2)

DB21, ... DBX20.3 (feed stop for geometry axis 3)

stop the relevant geometry axes if a channel in JOG mode.

The default values are effective after NC reset.

The last programmed FA values are effective after NC reset.

Not effective

Function Manual, 01/2015, 6FC5397-0BP40-5BA2

Basic Functions

Sinumerik 828d Sinumerik 840de sl