Function library
Speed (speed control)
Setting of motor control
12
334
EDBCSXS064 EN 4.0
Parameter setting
ƒ Set the proportional gain (V
pn
) via C0070:
– Enter approx. 50 % of the speed setpoint (100 % = 16384 = n
max
).
– Increase C0070 until the drive becomes instable (pay attention to engine noises).
– Reduce C0070 until the drive runs stable again.
– Reduce C0070 to approx. half the value.
ƒ 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
Code Possible settings IMPORTANT
No. Designation Lenze/
{Appl.}
Selection
C0070 Vp speedCTRL 3.0
Proportional gain of speed
controller (V
pn
)
154
0.00 { 0.01} 127.99
ƒ The reset time (T
nn
) is set via C0071:
– Reduce C0071 until the drive becomes instable (pay attention to engine noises).
– Increase C0071 until the drive runs stable again.
– Increase C0071 to approx. the double value.
Code Possible settings IMPORTANT
No. Designation Lenze/
{Appl.}
Selection
C0071 Tn speedCTRL 24.0
Reset time − speed controller
(T
nn
)
154
1.0 {0.5 ms} 6000.0
ƒ The derivative gain (T
dn
) is set via C0072:
– Increase C0072 during operation until an optimal control mode is reached,
although the D component is mostly not used in praxis (C0072=0).
Code Possible settings IMPORTANT
No. Designation Lenze/
{Appl.}
Selection
C0072 Td speedCTRL 0.0
Derivative gain of speed
controller (T
dn
)
154
0.0 {0.1 ms} 32.0
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