7 Advanced Settings
7 - 46
High-function General-purpose Inverter RX2 Series User’s Manual
This switches the control gain (ASR gain) of motor control from Proportional Integral (PI) control to Pro-
portionality (P) control.
When the motor control is switched from Proportional Integral (PI) Control to Proportionality (P) Control,
the whole gain of a speed control loop lowers. That may control vibration, etc.
You can switch from/to PI control to/from P control by selecting 062[PPI] Switching of PPI control and
turning OFF/ON the signal.
Use the following formula when calculating P control P gain.
The relationship between speed fluctuation ratio and speed tolerance is calculated based on the follow-
ing schematic formula.
Precautions for Correct Use
In the case of using this function, [AA121] control method, sensorless vector control, sensor-
less vector control in the zero speed area, and sensor vector control need to be selected.
7-3-3 P/PI Switching Function
Control gain switching function [HA120] = 00
Terminal function [PPI]OFF [PPI]ON
[CAS]OFF
PI control P gain 1 [HA125]
PI control I gain 1 [HA126]
P control P gain 1 [HA127]
[CAS]ON
PI control P gain 2 [HA128]
PI control P gain 2 [HA129]
P control P gain 2 [HA130]
(P control P gain) =
(Speed fluctuation ratio)
10
(%)
(Speed fluctuation ratio) =
Synchronous rotation at the base speed (min
-1
)
Speed tolerance at the rated torque X(min
-1
)
×100%
Under PI control
Under P control
Torque
Number of revolutions
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