87
DRIVE THE MOTOR
3
Parameter list
Parameter List
PID control / Dancer control
127
PID control
automatic
switchover
frequency
0.01Hz 9999
0 to 400Hz
Frequency at which the control is
automatically changed to PID control.
9999
Without PID automatic switchover function
128
PID action
selection
10
0
PID control invalid
20
PID reverse action Measured value
input (terminal 4)
Set value (terminal
2 or
Pr. 133)
21
PID forward action
40 to 43
Dancer control
129
PID proportional
band
0.1% 100%
0.1 to
1000%
If the proportional band is narrow
(parameter setting is small), the
manipulated variable varies greatly with a
slight change of the measured value.
Hence, as the proportional band narrows,
the response sensitivity (gain) improves
but the stability deteriorates, e.g. hunting
occurs. Gain Kp= 1/proportional band
9999
No proportional control
130
PID integral time
0.1s 1s
0.1 to
3600s
For deviation step input, time (Ti) required
for only the integral (I) action to provide the
same manipulated variable as that for the
proportional (P) action. As the integral time
decreases, the set point is reached earlier
but hunting occurs more easily.
9999
No integral control.
131
PID upper limit
0.1% 9999
0 to 100%
Upper limit value.
If the feedback value exceeds the setting,
the FUP signal is output. The maximum
input (20mA/5V/10V) of the measured
value (terminal 4) is equivalent to 100%.
9999
No function
132
PID lower limit
0.1% 9999
0 to 100%
Lower limit value.
If the measured value falls below the
setting range, the FDN signal is output.
The maximum input (20mA/5V/10V) of the
measured value (terminal 4) is equivalent
to 100%.
9999
No function
133
PID action set
point
0.01% 9999
0 to 100%
Used to set the set point for PID control.
9999
PID control
Terminal 2 input
voltage is the set
point.
Dancer control Always 50%
134
PID differential
time
0.01s 9999
0.01 to 10s
For deviation lamp input, time (Td) required
for providing only the manipulated variable
for the proportional (P) action. As the
differential time increases, greater
response is made to a deviation change.
9999
No differential control.
44
Second
acceleration/
deceleration time
0.1s
5/10/
15s ∗
0 to 3600s
This parameter is the acceleration time of
the main speed during dancer control.
It will not function as second acceleration
time.
* Initial value differs according to the inverter
capacity. (3.7K or less/5.5K, 7.5K/11K, 15K)
45
Second
deceleration time
0.1s 9999
0 to 3600s,
9999
This parameter is the deceleration time of
the main speed during dancer control.
It will not function as second deceleration
time.
575
Output
interruption
detection time
0.1s 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
0.01Hz 0Hz 0 to 400Hz
Set the frequency at which the output
interruption processing is performed.
577
Output
interruption
cancel level
0.1% 1000%
900 to
1100%
Set the level (
Pr. 577
minus 1000%) at
which the PID output interruption function
is canceled.
Function
Parameter
Name
Incre-
ments
Initial
Value
Range Description
Parameter
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