Siemens SINUMERIK 840Di Function Manual page 1630

Detailed Description
2.2 Feedrate FA for positioning axes
Parameter: Feed value
• Value range
• NC/PLC interface (channel-specific)
• NC/PLC interface (axis-specific)
RESET response
After end of program or NC-RESET, the feedrate value takes effect depending on machine
data:
MD22410 $MC_F_VALUES_ACTIVE_AFTER_RESET = <value>
Value
0
1
2-22
0.001...999,999.999 mm/min, degrees/min or 0.001, ...39 999,9999 inch/min
For more information about the value range of the axial feedrate see:
References:
/PA/ Programming Guide, Fundamentals"
/FB/ Description of Functions, Basic Machine; Velocities, Setpoint/Actual-Value Systems,
Closed-Loop Control (G2)
The feedrate is output at the channel-specific NC/PLC interface:
DB21, ... DBB158 - DBB193
For a description of the channel-specific NC/PLC interface signals (modification signal,
machine axis number of positioning axis, etc.) see:
References:
/FB/Description of Functions, Basic Machine; Various Interface Signals and Functions
(A2)
The feed value is output at the axis-specific NC/PLC interface:
DB31, ... DBB78 - DBB81
Note
Maximum axis velocity
The maximum axis velocity is not exceeded:
MD32000 $MA_MAX_AX_VELO (maximum axis velocity)
F function output to the NC/PLC interface
Output of the F functions to the NC/PLC interface is not recommended. Activating the
output of F functions to the NC/PLC interface can cause a drop in velocity in continuous-
path mode. The output of F functions to the NC/PLC interface can be suppressed:
MD22240 $MC_AUXFU_F_SYNC_TYPE (output time of the F functions)
For a detailed description please refer to:
References:
/FB/ Description of Functions - Basic Machine, Auxiliary Functions (H2)
Meaning
After NC RESET the default values are effective.
After NC RESET the last FA values to be programmed are effective.
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Feeds (V1)