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8-10 VS1-MD AC Drive User Manual
8.4 PID Control
H50: Select the feedback type of PID controller.
H51: Set the percentage of output to error. If P Gain is set to 50%, 50% of the error
value will be output. Higher value can reach the target control value faster but it may
cause oscillation.
H52: Set the time to output the accumulated error value. Set the time required to
output 100% when the error value is 100%. If H52 [Integral time for PID controller (I
gain)] is set to 1 sec and the error becomes 100%, 100% will be output in 1 sec.
Adjusting the value may reduce the nominal error. If the value is reduced, response
will be faster but setting too low may lead to controller oscillation.
H53: Set the output value to the variation of the error. The error is detected by 0.01
sec in SV-iG5A. If differential time is set to 0.01 sec and the percentage variation of
error per 1 sec is 100%, 1% per 10msec is output.
H54: PID Feed Forward Gain. Set the gain to add the target value to the PID controller
output.
H55, H56: Limits the output of the PID controller.
I17 to I24: To go from PID to normal operation, set one of P1-P8 terminal to 21 and
turn ON.
d1: Calculates the feedback from H50 into Motor frequency and displays it.
Group Display Parameter Name Setting Range Default Unit
Function
group 2
H40 [Control Mode Selection] 2 0 to 3 0 -
H50 [PID Feedback Selection] - 0 to 1 0 -
H51 [P Gain for PID Controller] - 0 to 999.9 300.0 %
H52 [I Gain for PID Controller] - 0.1 to 32.0 1.0 sec
H53 [D Gain for PID Controller] - 0.0 to 30.0 0 sec
H54 [F Gain for PID Controller] 0 to 999.9 0 %
H55 [PID Output Frequency High Limit] - 0.1 to 400 60.0 Hz
H56 [PID Output Frequency Low Limit] - 0.1 to 400 0.50 Hz
I/O group t1 to t8 [Multi-function Input Terminal
P1-P8 Definition]
21 0 to 25 - -
Drive group d1 [Motor RPM]
Set H40 to “2” [PID Feedback control].
Output frequency of the inverter is controlled by PID control for use as constant control of flow, pressure or
temperature.
H50 [PID Feedback Selection]
0 Terminal I input (0 to 20[mA] )
1 Terminal V1 input (0 to 10[V])