09.95
Siemens AG 2001 All Rights Reserved 6FC5197jAA50 9–29
SINUMERIK 840C (IA)
DRamp 2 (position setpoint with reduced acceleration value)
MD
RD t
As
ESD
t
O
v
Speed
character-
istic
Position
Fig. 9.10
Conditions Operating mode :Position setpoint
Signal type : Ramp
ESD : Settling time
RD : Ramp time
MD : Measurement time
A : Amplitude
O : Speed offset
Note Set acceleration is lower (speed characteristic).
Explanation The setpoint characteristic is the same as that in the ramp 1 diagram except that
the drive acceleration has been reduced. The position setpoint transitions during
speed changes are therefore softer. The speed is influenced by the values set in
the NC-MD:
SSpindle : MD 4780 MD 4850
SAxis : MD 2760
9 Drive Servo Start-Up Application (as from SW 3)
9.3.3 Signal waveforms of function generator (as from SW 3)
10.94