Siemens SINUMERIK 840Di Function Manual page 2007

DB 31, ...
DBX3.2 - DBX3.5 Activate fixed feed rate 1 - 4 for machine axes
Edge evaluation: no
Description These signals are used to select/de-select the function "Fixed feed" and define which fixed feed
should be effective for machine axes.
Corresponding to .... MD12202 $MN_PERMANENT_FEED[n]
MD12200 $MN_RUN_OVERRIDE_0
DB31, ...
DBB19 Spindle override
Edge evaluation: no
Signal state 1 or The spindle override can be defined via the PLC in binary or Gray coding.
edge change
The override value determines the percentage of the programmed speed setpoint that is issued to
0 → 1
the spindle.
With binary coding, the override is interpreted in %. 0% to 200% feed changes are possible, in
accordance with the binary value in the byte.
The following permanent assignment applies:
Binary values > 200 are limited to 200%.
The machine data:
MD12100 $MN_OVR_FACTOR_LIMIT_BIN (limit for binary-coded override switch)
can be used to additionally limit the maximum spindle override.
NC/PLC Interface Signals (Z1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Signal(s) updated: cyclic
Signal(s) updated: cyclic
Detailed Description
2.16 Feeds (V1)
2-143