Siemens SINUMERIK 840Di Function Manual page 390

Detailed Description
2.2 Metric/inch measuring system
Range
Tool offsets
Length-related machine data
Length-related setting data
Length-related system variables
GUD
LUD
PUD
R parameters
Siemens cycles
Jog/handwheel increment factor
References:
/PG/Programming Guide, Fundamentals; List of Addresses
2.2.3 Manual switchover of the basic system
General
The relevant softkey on the HMI in the "Machine" operating area is used to change the
measuring system of the controller.
The change in the measuring system occurs only under the following boundary conditions:
• MD10260 $MN_CONVERT_SCALING_SYSTEM=1
• Bit 0 of MD20110 $MC_RESET_MODE_MASK is set in every channel.
• All channels are in the Reset state.
• Axes doe not traverse with JOG, DRF or PLC.
• Constant grinding wheel peripheral speed (GWPS) is not active.
Actions such as part program start or mode change are disabled for the duration of the
measuring system changeover.
If the measuring system cannot be changed, this is indicated by a message to that effect on
the user interface. These measures ensure that a consistent set of data is always used for a
running program with reference to the measuring system.
The actual change in the measuring system is made by writing all the necessary machine
data and subsequently activating them with a RESET.
Machine data:
MD10240 $MN_SCALING_SYSTEM_IS_METRIC
and the corresponding G70/G71/G700/G710 settings in machine data:
MD20150 $MN_GCODE_RESET_VALUES
are switched automatically and consistently for all configured channels.
The value of machine data:
MD20150 $MC_GCODE_RESET_VALUES[12]
changes between G700 and G710.
2-16
G70/G71
G/G
G/G
G/G
G/G
G/G
G/G
G/G
G/G
P/P
G/G
Velocities, Setpoint/Actual-Value Systems, Closed-Loop Control (G2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
G700/G710
P/P
P/P
P/P
P/P
G/G
G/G
G/G
G/G
P/P
G/G