Mitsubishi Electric FR-A720-0.4K Instruction Manual page 138

Parameter
Name
Speed control
821
integral time 1
Speed control
831
integral time 2
822
Refer to Pr. 74.
—
Speed detection
823
filter 1
Speed detection
833
filter 2
Torque control P
824
gain 1
Torque control P
834
gain 2
Torque control
825
integral time 1
Torque control
835
integral time 2
826
Refer to Pr. 74.
—
Torque detection
827
filter 1
Torque detection
837
filter 2
Model speed
828
control gain
Speed feed forward
control/model
877
adaptive speed
control selection
Speed feed forward
878
filter
Speed feed forward
879
torque limit
Load inertia ratio
880
Speed feed forward
881
gain
Incre- Initial
Range
ments Value
Set the integral time during speed control.
(Decrease the value to shorten the time
0.001s 0.333s 0 to 20s
taken for returning to the original speed if
speed variation with disturbance occurs.)
Second function of Pr. 821 (valid when the
0 to 20s
RT terminal is on)
0.001s 9999
9999 No function
Set the primary delay filter for the speed
0.001s 0.001s 0 to 0.1s
feedback.
Second function of Pr. 823 (valid when RT
0 to 0.1s
signal is on)
0.001s 9999
9999 No function
Set the proportional gain for the current
control of the q and d axes. (Increasing the
1% 100% 0 to 200% value improves trackability in response to a
current command change and reduces
current variation with disturbance.)
Second function of Pr. 824 (valid when the
0 to 200%
RT terminal is on)
1% 9999
9999 No function
Set the integral time for the current control
of the q and d axes. (Decreasing the value
0.1ms 5ms 0 to 500ms shortens the time taken to return to the
original torque if current variation with
disturbance occurs.)
Second function of Pr. 825 (valid when the
0 to 500ms
RT signal is on)
0.1ms 9999
9999 No function
Set the primary delay filter for the current
0.001s 0s 0 to 0.1s
feedback.
Second function of Pr. 827 (valid when the
0 to 0.1s
RT signal is on)
0.001s 9999
9999 No function
1% 60% 0 to 1000% Set the gain for model speed controller.
0 Normal speed control is exercised
1 Speed feed forward control is exercised.
1 0
2 Model adaptive speed control is enabled.
Set the primary delay filter for the speed
0.01s 0s 0 to 1s feed forward result calculated using the
speed command and load inertia ratio.
Limits the maximum value of the speed
0.1% 150% 0 to 400%
feed forward torque.
0 to 200
Set the load inertia ratio.
0.1 7
Inertia ratio found by easy gain turning.
times
Set the feed forward calculation result as a
1% 0% 0 to 1000%
gain.
Parameter List
Description
× : disabled
: enabled
3
×
131