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îš„PI Control Methods
There are two PI control methods. Select the method by setting parameter b5-01.
When the PI control is enabled (b5-01=1 or 3) further changes to other parameter settings occur automatically.
Following parameters change their Access Level to Quick Access Level:
Following parameters change their Default Setting:
îš„PI Input Methods
PI Target Value Input Methods
Normally, the frequency reference selected in b1-01 is the PI target value, the PI target value can also be set as
shown in the following table.
Set Value Control Method
0 PI control disabled
1 PI output becomes directly the Inverter output frequency.
3 PI output is added to the frequency reference as compensation value of the Inverter output frequency.
Parameter Number Name Access Level
H3-08 Analog input A2 signal level selection Q
H3-09 Analog input A2 function selection Q
H3-13 Terminal A1/A2 switching Q
b5-31 PI unit selection Q
b5-02 Proportional (P) gain Q
b5-03 Integral (I) time Q
Parameter Number Name Default Setting
H3-09 Analog input A2 function selection B
PI Target Input Method Setting Conditions
MEMOBUS register 0006H
Set MEMOBUS bit 1 in register address 000FH to 1 (enable/disable PI target value
from communications) to be able to use register number 0006H as the PI target value.
Parameter setting If b5-18 is set to 1 the value in b5-19 becomes the PI target value.
NOTE
If the PI function is used the frequency reference value becomes the target value, which is set and shown
in Hz on the operator. Nevertheless, internally the PI target value is used in percent. I.e. the following for-
mula is used:
PI target value [%] =
frequency reference [Hz]
max. output frequency [Hz]
• 100%
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