Omron SYSDRIVE 3G3RV, User Manual

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PID Control Methods
There
are four PID control methods. Select the method by setting parameter b5-01.
n
PID Input Methods
Enable
PID control using parameter b5-01, and set the PID target value and PID feedback value.
PID Target Value Input Methods
Select
the PID control target value input method according to the setting in b1-01 (Reference Selection).
Normally,
the frequency reference selected in b1-01 is the PID target value, but you can also set the PID target
value
as shown in the following table.
PID Feedback Input Methods
Select
one of the following PID control feedback input methods.
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PID Adjustment Methods
Use
the following procedure to adjust PID while performing PID control and measuring the response wave-
form.
1. Set
b5-01 (PID Control Mode Selection) to 1, 2, 3 or 4 (PID control enabled).
2. Increase
b5-02 (Proportional Gain (P)) to within a range that does not vibrate.
3. Reduce
b5-03 (Integral (I) time) to within a range that does not vibrate.
4. Increase
b5-05 (Derivative (D) time) to within a range that does not vibrate.
Set Value Control Method
1
PID
output becomes the Inverter output frequency, and D control is used in the difference between PID
target
value and feedback value.
2 PID
output becomes the Inverter output frequency, and D control is used in the PID feedback value.
3
PID
output is added as compensation value of the Inverter output frequency, and D control is used in the
difference
between PID target value and feedback value.
4
PID
output is added as compensation value of the Inverter output frequency, and D control is used in the
PID
feedback value.
PID Target Input Method Setting Conditions
Multi-Function
Analog Ter-
minal
A2 Input
Set
H3-09 to C (PID target value). Also, be sure to set H6-01 (pulse train input function
selection)
to 1 (PID feedback value).
RS-422A/485
register 0006H
Set
RS-422A/485 bit 1 in register address 000FH to 1 (enable/disable PID target value
from
communications) to be able to use register number 0006H as the PID target value.
Pulse
train input
Set
H6-01 to 2 (PID target value).
Input Method Setting Conditions
Multi-function
analog input
Set
H3-09 (Multi-function Analog Input Terminal A2 Selection) to B (PID feedback).
Pulse
train input
Set
H6-01 to 1 (PID feedback).
INFO
Adjust PID target value and PID feedback value using the following items.
• Analog
input: Adjust using the analog input terminal gain and bias.
• Pulse
train input: Adjust using pulse train scaling, pulse train input gain, and pulse train input bias.