Mitsubishi Electric FR-A720-0.4K Instruction Manual page 137

Parameter List
Parameter
Torque command
804
source selection
Torque command
805
value (RAM)
Torque command
806
value
(RAM,EEPROM)
Speed limit
807
selection
Forward rotation
808
speed limit
Reverse rotation
809
speed limit
810
Refer to Pr. 22.
—
811
Refer to Pr. 22 and Pr. 37.
—
812 to 817
Refer to Pr. 22.
—
Easy gain tuning
818
response level
setting
819
Easy gain tuning
selection
Speed control P
820
gain 1
Speed control P
830
gain 2
130
Incre- Initial
Name
ments Value
1 0
1% 1000%
1% 1000%
1 0
0.01Hz 60Hz
0.01Hz 9999
1 2
1 0
1% 60%
1% 9999
Range Description
Torque command by terminal 1 analog
0
input
Torque command by parameter
1
Pr.805 or Pr.806 setting (-400% to 400%)
Torque command using pulse train input
2
(FR-A7AL)
Torque command by using CC-Link (FR-
3
A7NC)
4 Digital input from the option (FR-A7AX)
5
Torque command by using CC-Link (FR-
A7NC)
6
Digital setting of the torque command can
600 to
be made by setting Pr. 805 or Pr. 806.
1400%
(Setting from communication option, etc.
can be made.)
600 to
In this case, set the speed limit value to an
1400%
appropriate value to prevent overspeed.
Use the speed command value during
0
speed control as speed limit.
According to Pr. 808 and Pr. 809, set the
1 speed limit in forward and reverse rotation
directions individually.
The analog voltage of the terminal 1 input
is used to make speed limit. For 0 to 10V
input, set the forward rotation speed limit.
(The reverse rotation speed limit is Pr. 1
Maximum frequency)
2 For -10 to 0V input, set the reverse rotation
speed limit. (The forward rotation speed
limit is Pr. 1 Maximum frequency.) The
maximum frequency of both the forward
and reverse rotations is Pr. 1 Maximum
frequency.
Set the speed limit level during forward
0 to 120Hz
rotation. (valid when Pr. 807 = 1)
Set the speed limit level during reverse
0 to 120Hz
rotation. (valid when Pr. 807 = 1)
The setting is the same as that of the
9999 torque limit in the forward rotation
direction.
1 : Slow response
↓
1 to 15
15 : Fast response
0 No tuning
With load estimation
1 (only under vector
control)
Manual input of load
2
(Pr. 880)
Set the proportional gain for speed control.
(Increasing the value improves trackability
0 to 1000% in response to a speed command change
and reduces speed variation with
disturbance.)
Second function of Pr. 820 (valid when RT
0 to 1000%
signal is on)
9999 No function
: enabled
× : disabled
×
The optimum gain
×
is automatically set
from the torque
command and
speed during motor
operation.