adjustment time; however, the differential operation increases noise interference. Note that a too
large differential causes more noise interference. In addition, the differential shows the change
and the differential output is 0 when there is no change. Note that you cannot use the differential
control independently. You must use it with the other two controllers for the PD controller or PID
controller.
Sets the D controller gain to determine the deviation change response. Using a suitable
differential time reduces the P and I controllers overshoot to decrease the oscillation for a stable
system. A differential time that is too long may cause system oscillation.
The differential controller acts on the change in the deviation and cannot reduce the
interference. Do not use this function when there is significant interference.
08-04
Upper Limit of Integral Control
Settings
Defines an upper bound for the integral gain (I) and therefore limits the master frequency.
The formula is: Integral upper bound = Maximum Operation Frequency (Pr.01-00) × (Pr.08-04%).
An excessive integral value causes a slow response due to sudden load changes and may
cause motor stall or machine damage. If so, decrease it to a proper value.
08-05
PID Output Command Limit (Positive Limit)
Settings
Defines the percentage of the output frequency limit during the PID control. The formula is
Output Frequency Limit = Maximum Operation Frequency (Pr.01-00) × Pr.08-05%.
08-06
PID Feedback Value by Communication Protocol
Settings
Use communications to set the PID feedback value when the PID feedback input is set to
communications (Pr.08-00 = 7 or 8).
08-07
PID Delay Time
Settings
08-20
PID Mode Selection
Settings
0: Use conventional PID control structure.
1: The proportional gain, integral gain and differential gain are independent. You can customize
the P, I and D value to fit your application.
Pr.08-07 determines the primary low pass filter time when in PID control. Setting a large time
constant may slow down the drive's response speed.
0.0–100.0%
0.0–110.0%
-200.00–200.00%
0.0–2.5 sec.
0: Serial connection
1: Parallel connection
Chapter 12 Descriptions of Parameter SettingsMS300
401
Default: 100.0
Default: 100.0
Default: 0.00
Default: 0.0
Default: 0