M40: Automatic Gear Stage Selection For Speeds Outside The Configured Switching Thresholds - Siemens SINUMERIK 840D Function Manual

Mc axes and spindles

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Table of Contents

DB31, ... DBX60.7 and DB31, ... DBX60.6 (position reached with exact stop coarse / fine)

The two limit values defined by machine data:

MD36000 $MA_STOP_LIMIT_COARSE (Exact stop limit coarse)

MD36010 $MA_STOP_LIMIT_FINE (Exact stop limit fine)

are output to the PLC using NC/PLC IS:

DB31, ... DBX60.7 (Position reached with exact stop coarse)

DB31, ... DBX60.6 (Position reached with exact stop fine).

Block change for SPOS and M19

When positioning the spindle with SPOS or M19 the block is changed

dependent on end point monitoring with NC/PLC IS:

DB31, ... DBX60.6 (Position reached with exact stop fine).

All other functions programmed in the block must have achieved their end criterion (e.g., all

auxiliary functions acknowledged by the PLC).

With SPOSA, the block change does not depend on the monitoring of the end point.

M40: Automatic gear stage selection for speeds outside the configured switching

When M40 is active, an automatic gear stage selection is also made if the programmed spindle

speed S... lies outside the configured switching thresholds.

Axes and spindles

Function Manual, 06/2019, A5E47437747B AA

S1: Spindles

18.8 Spindle monitoring

Sinumerik 840d sl