Siemens SINUMERIK 840D sl Function Manual page 736

Extended functions

Hide thumbs Also See for SINUMERIK 840D sl:

Table of Contents

R2: Rotary axes

13.2 Modulo 360 degrees

NC/PLC interface signals

Traversing range limits

The traversing range of a rotary axis can be restricted by axis-specific traversing range limits

(machine and setting data for software limit switch, for example, and working area limitation).

For modulo rotary axes the traversing range limits are invalid as standard.

Activation of the traversing range limits for modulo rotary axes can be requested from the PLC

user program via the following NC/PLC interface signal:

DB31, ... DBX12.4 = 1 (modulo rotary axes: Activate traversing range limits)

The NC feedback signal is realized using the NC/PLC interface signal:

DB31, ... DBX74.4 == 1 (modulo rotary axes: traversing range limits active)

Synchronization with STOPRE

The M/H command for setting the NC/PLC interface signal must follow a STOPRE in the NC

program, in order to ensure through synchronization that only the program blocks after the

changeover are monitored.

Supplementary conditions

It is only possible to activate/deactivate software limit switch monitoring via the NC/PLC

interface signal for modulo rotary axes. The modulo rotary axis must be referenced for this and

the limiting pair must be active.

Both limits must be active for the correct monitoring of the working area limitations. Either via

G26/G25 or setting data:

● SD43400 $SA_ WORKAREA_PLUS_ENABLE

● SD43410 $SA_WORKAREA_MINUS_ENABLE.

Limited operating area of a modulo rotary axis

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

Extended Functions

Sinumerik 828d