3-35
Set Values
• Set the feedback adjustment gain with n085.
• The
feedback of the FI terminal multiplied by the feedback adjustment gain will be the feedback adjust
-
ment gain data of the Inverter.
n086 Proportional Gain (P)
Setting range 0.0 to 10.0 Unit Times Default setting 1.0
n087 Integral Time (I)
Setting range 0.0 to 100.0 Unit s Default setting 10.0
n088 Derivative Time (D)
Setting range 0.00 to 1.00 Unit s Default setting 0.00
Set Values
• The parameters n086, n087, n088 adjust PID control response.
• Set
n086, n087, and n088 to optimum values by operating the mechanical system. Refer to
page
3-36,
PID Adjustments
for details.
• Proportional
control or integral control will not be performed if n086 or n087 is set to
0.0 and derivative
control will not be performed if n088 is set to 0.00.
n089 PID Offset Adjustment
Setting range –109 to 109 Unit % (Maximum
frequency ratio)
Default setting 100
Set Values
• The parameter n089 adjusts the PID control offset of the Inverter.
• The
Inverter adjusts the of
fset of the voltage used to determine the set point and the of
fset of analog
input to the FI terminal according to the value set with n089.
• Set
n089 so that the output frequency of the Inverter will be 0 Hz when the set point and feedback are
both zero.
n090 Integral Upper Limit
Setting range 0 to 109 Unit % (Maximum
frequency ratio)
Default setting 100
Set Values
• The upper limit of integral control quotients is set with n090.
• It is usually unnecessary to change the default-set value of n090.
• Set
n090 to a small value if the response of the Inverter may damage the
load or allow the motor to go
out of control when the load factor of the motor varies greatly.
• The feedback will not agree with set point if n090 is set to a value that is too small.
n091 PID Primary Delay Constant
Setting range 0.0 to 2.5 Unit s Default setting 0.0
Preparing for Operation Chapter 3
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