Operating Instructions

Descriptions of Parameter Settings
Descriptions of Parameter Settings
197 | 443
Pr.
Explanation
Settings
Default
07-62
dEb gain (Kp)
0 to 65535
8000
07-63
dEb gain (Ki)
0 to 65535
150
Sets the PI gain of DC bus voltage controller when the dEb function activates.
If the DC bus voltage drops too fast, or the speed oscillation occurs during deceleration after the dEb function
activates, adjust Pr.07-62 and Pr.07-63. Increase the Kp setting to quicken the control response, but the oscillation
may occur if the setting is too large. Use Ki parameter to decrease the steady-state error to zero, and increase the
setting to quicken the response speed.
Description Group 08
08 High-function PID Parameters
indicates the parameter can be set during operation.
Pr.
Explanation
Settings
Default
08-00
Terminal selection of PID
feedback
0: No function
1: Negative PID feedback: by analog input
(Pr.03-00, Pr.03-01)
2: Negative PID feedback: by single-phase input (MI7), without direction
(Pr.10-16=5)
4: Positive PID feedback: by analog input (Pr.03-00, Pr.03-01)
5: Positive PID feedback: by single-phase input (MI7), without direction
(Pr.10-16=5)
7: Negative PID feedback: by communication protocols
8: Positive PID feedback: by communication protocols
0
Negative feedback:
Error = + Target value (set point) – Feedback. Use negative feedback when the detection value increases if the
output frequency increases.
Positive feedback:
Error = - Target value (set point)+ Feedback. Use positive feedback when the detection value decreases if the
output frequency increases.
When Pr.08-00 ≠ 7 or ≠ 8, the input value is disabled. The setting value does not remain when the drive is powered
off.
Common applications for PID control:
Flow control: Use a flow sensor to feedback the flow data and perform accurate flow control.
Pressure control: Use a pressure sensor to feedback the pressure data and perform precise pressure control.
Air volume control: Use an air volume sensor to feedback the air volume data to achieve excellent air volume
regulation.
Temperature control: Use a thermocouple or thermistor to feedback temperature data for comfortable temperature
control.
Speed control: Use a speed sensor to feedback motor shaft speed or input another machine speed as a target
value for synchronous control.
PID control loop: