202
Special operation and frequency control
(1) PID control basic configuration
⋅ Pr. 128 = "10, 11" (Deviation value signal input)
⋅ Pr. 128 = "20, 21" (Measured value input)
Parameter
Number
Name
Initial
Value
Setting Range Description
575
Output interruption
detection time
1s
0 to 3600s
The inverter stops operation if the output frequency after
PID operation remains at less than the Pr. 576 setting for
longer than the time set in Pr. 575.
9999 Without output interruption function
576
Output interruption
detection level
0Hz 0 to 400Hz
Set the frequency at which the output interruption
processing is performed.
577
Output interruption
cancel level
1000% 900 to 1100%
Set the level (Pr. 577 minus 1000%) to release the PID
output interruption function.
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 156)
*1 Pr. 129, Pr. 130, Pr. 133 and Pr. 134 can be set during operation. They can also be set independently of the operation mode.
+
-
IM
Deviation signal
Feedback signal (measured value)
Ti S
1
1+
+Td S
Kp
PID operation
To outside
Set point
Inverter circuit
Motor
Terminal 1
0 to 10VDC
(0 to 5V)
Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Manipulated
variable
+
-
IM
Ti S
Kp 1+ +Td S
1
PID operation
Pr. 133 or
terminal 2
Set point
Inverter circuit
Motor
Feedback signal (measured value)
Terminal 4
Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Manipulated
variable
0 to 5VDC
(0 to 10V, 4 to 20mA)
4 to 20mADC (0 to 5V, 0 to 10V)
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