Siemens SINAMICS S120 Function Manual page 830

Applications
11.4 DCC axial winder
Function blocks
Note
Detailed information on the function blocks is provided in the "SINAMICS SIMOTION
Function Manual DCC Block Description" as well as in the "SINAMICS SIMOTION
Programming Manual DCC Editor".
The "DCC axial winder" function involves the following DCBs (drive control blocks - function
blocks for the drive control):
1. TTCU block: Winding hardness characteristic
2. DCA block: Diameter calculator
checked for plausibility.
3. INCO block: Dynamic calculation of the moment of inertia for torque precontrol and Kp
adaptation of the speed controller
(see figure "Axial winder setup", abbreviations refer to block description).
The block calculates the mass moment of inertia of a wound roll, referred to the motor
side. In addition to the diameter (from DCA), the block also contains information on the
geometry and material properties of the winder and the winding product.
The static mass moment of inertia referred to the motor side is passed to the DCC block
via the parameter r1493. The result is fed back to the basic system via the scaling
828
The block is used for defining the tension setpoint as a function of the actual diameter of
the roll being wound. The setpoint is adjusted according to a selectable characteristic
curve.
The DCA (Diameter Calculator) is used to determine the actual diameter of a roll being
wound based on the path velocity and the motor speed. The calculated diameter is
parameter p1497 (referred to the static moment of inertia).
DEN SCL
OFS
n :
1
M
b
Figure 11-6 Axial winder setup
DMIN
D
n
2
DMAX
GF = n /n
1 2
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
V
W
n :
1
n :
2
M :
b
Drive functions