Parameter
No.
Function name Data
Default da-
ta
Unit
d70
Speed Control Slip Frequency
Limit
0.00 to 100.00 100.00 %
Output
frequency
[d70]
Slip
frequency
calculation
[d70]
Frequency
reference
Speed
detection value
IM V/f control with speed sensor
IM Dynamic torque vector control with speed sensor
[d03],
([A45],
[b45],
[r45])
[d04],
([A46],
[b46],
[r46])
V/f control with speed feedback slip compensation proportional gain
At first, adjust the proportional gain for speed feedback control.
• Check and gradually increase the set value of PG feedback value (monitor mode: 3_29).
• While checking the PG feedback value (monitor mode: 3_29), increase the value within the
range where the motor speed is stable.
•
If the motor speed fluctuates or the motor vibrates wildly, decrease the set value until it becomes
stable.
• When adjusting the response if the load is actually activated, increase the set value to improve
response, or decrease the set value to make it stable.
V/f control with speed feedback slip compensation integral time
Next, adjust the integral time for speed feedback control.
• Check and gradually decrease the set value of PG feedback value (monitor mode: 3_29).
• Decrease the value in the PG feedback value (monitor mode: 3_29) until it matches the refer-
ence frequency.
• If the motor speed fluctuates or the motor vibrates wildly, increase the set value until it becomes
stable.
• When adjusting the response if the load is actually activated, decrease the set value to improve
response, or increase the set value to make it stable.
Speed control limiter
Speed Control Slip Frequency Limit (d70) is the limiter for the slip frequency that is added to the
frequency reference. The maximum frequency is taken to be 100%. Ordinarily, leaving this setting
at 100% causes no problems.
6 Vector Control and Applied Functions
6-15
M1 Series Standard Type User's Manual (I669)
6-2 V/f control with speed feedback
6
6-2-3 Adjustments for V/f Control with Speed Feedback
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