Siemens SINUMERIK 840D sl Function Manual page 1777

Supplementary conditions
3.1 General boundary conditions
Several feeds in one block
The "Several feeds in one block" function is only available in conjunction with the:
"Synchronized Actions" function.
References:
/FBSY/ Description of Functions Synchronized Actions
3.2 Supplementary conditions for feedrate programming
Unit of measurement
The applicable unit of measurement for feedrates is based on the value entered in machine
data:
MD12240 SCALING_SYSTEM_IS_METRIC
(standard control system metric/imperial)
and the type of axis entered in machine data:
MD30300 IS_ROT_AX
(rotary or linear axis).
Standard setting for feedrate type
G94 is displayed on the screen as the standard setting.
The initial setting (standard programming setting) for the feedrate type is only displayed
when the part program starts up.
The initial setting is set in machine data:
MD20150 GCODE_RESET_VALUES (initial setting for G groups).
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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