Siemens SINUMERIK 840D sl Function Manual page 1665

DB31, ...
DBB0 Feedrate override (axis-specific)
The factors listed in the table for the axial feedrate override
are stored in the NC-specific machine data:
MD12010 $MN_OVR_FACTOR_AX_SPEED [n]
The table contains the default settings.
The number of possible switch settings for standard machine panels is described in the Configuration
Manual for SINUMERIK 840D.
Corresponding to ... DB31, ... DBX1.7 (override effective)
MD12010 $MN_OVR_FACTOR_AX_SPEED [n] (evaluation of the axis feedrate override switch)
MD12100 $MN_OVR_FACTOR_LIMIT_BIN (limit for binary coded override switch)
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Z1: NC/PLC interface signals
19.12 Feeds (V1)
1665