range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
b5-07 PID Offset –100.0
to 100.0
% 0.0 Advanced
This parameter can be changed during operation.
Explanation of Set Values
• Parameter b5-07 adjusts the PID control offset.
• If
both the target value and
the feedback value are set to zero, adjust the Inverter
’
s output frequency to
zero.
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
b5-08 PID Delay Time 0.00 to
10.00
Sec 0.00 Advanced
This parameter can be changed during operation.
Explanation of Set Values
• Parameter b5-08 is the low-pass filter setting for PID control outputs.
• Parameter
b5-08 is preset at the factory to the optimum value for most applications, so there is normal
-
ly no need to change the setting.
• If
the
viscous friction of the mechanical system is high, or if the rigidity is low
, causing the mechanical
system
to vibrate, increase the set value so that it is higher than the vibration frequency period. This
will decrease the responsiveness, but it will prevent the vibration.
D Jump Frequency Function
While the Inverter is in PID control, a frequency band can be avoided by setting parameters d3-01
through
d3-04 to the desired frequencies. Use this function to prevent vibration of the mechanical sys
-
tem.
Note The
frequency band to be set should be as narrow as possible, otherwise PID control will not func
-
tion properly and the mechanical system may vibrate.
D PID Control Reverse Characteristics
Use the following parameter to set or adjust PID control characteristics.
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
b5-09 Output Level Set 0, 1 --- 0 Advanced
Explanation of Settings
Set value Contents
0 Positive PID output.
1 Negative PID output. (–1 is added to the operation result of PID control.)
Advanced Operation Chapter
6
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