P/Pi Switching Function - Omron RX2 Series User Manual

7 Advanced Settings
7-3-3

P/PI Switching Function

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.
(P control P gain) =
The relationship between speed fluctuation ratio and speed tolerance is calculated based on the follow-
ing schematic formula.
(Speed fluctuation ratio) =
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.
Under P control
Torque
100%
0%
Control gain switching function [HA120] = 00
Terminal function
[CAS]OFF
[CAS]ON
7 - 46
10
(%)
(Speed fluctuation ratio)
Speed tolerance at the rated torque X(min
Synchronous rotation at the base speed (min
Under PI control
X
Number of revolutions
[PPI]OFF
PI control P gain 1 [HA125]
PI control I gain 1 [HA126]
PI control P gain 2 [HA128]
PI control P gain 2 [HA129]
High-function General-purpose Inverter RX2 Series User's Manual
-1
)
×100%
-1
)
[PPI]ON
P control P gain 1 [HA127]
P control P gain 2 [HA130]