Lenze ECSCSxxx - Manual (Page 337)

Function library
Speed (speed control)
Setting of motor control
12
l
337 EDBCSXS064 EN 4.0
12.27.3.6 Phase controller
The phase controller is required, for instance, to achieve a phase−synchronous operation
and a drift−free standstill.
Parameter setting:
1. Assign SPEED−MCTRL.PosSet (C7451) with a signal source, which provides the phase
difference between set angle and actual angle.
)
Note!
For the application "Speed and Torque", the phase difference has to be
generated externally (e .g. in a master control) and transferred via bus system.
2. Select a value > 0 at SPEED−MCTRL.PosLim (C7431/12).
3. Set SPEED−MCTRL.PosOn = TRUE (C7431/19) .
4. Set a highest possible proportional gain (V
pn)
of the speed controller in C0070.
In the PLC program, the variable SPEED−MCTRL.NAdapt (C7431/7) serves to change the
proportional gain (V
pn
):
– V
pn
= SPEED−MCTRL.NAdapt [%] x C0070
– If SPEED−MCTRL.NAdapt is not assigned, the following applies: V
pn
= 100 %,
C0070 = C0070
5. Set the gain of the phase controller > 0 via C0254.
Increase C0254 during operation until the drive has the required control mode.
Code Possible settings IMPORTANT
No. Designation Lenze/
{Appl.} Selection
C0254 Vp angle CTRL 0.4000 Phase controller gain (V
p
) ^ 337
0.0000 { 0.0001} 3.9999
Phase controller influence
The output of the angle controller is added to the speed setpoint.
ƒ When the actual angle is lagging, the drive is accelerated.
ƒ When the actual angle is leading, the drive is decelerated until the required angular
synchronism has been reached.
The influence of the phase controller consists of:
ƒ phase difference multiplied by the proportional gain V
p
(C0254).
ƒ Influence via an analog signal at SPEED−MCTRL.NAdapt (C7431/7).
V
p
= C0254 x SPEED−MCTRL.NAdapt / 16384
ƒ Limitation of the phase controller output
– The output of the angle controller is limited to the value
±SPEED−MCTRL.PosLim
(C7431/12).
–
±SPEED−MCTRL.PosLim limits the maximum speed−up of the drive with great
angular displacements.