Torque Command Source Selection; Speed Limit During Torque Control; Easy Gain Tuning Selection - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
804 to 806

Torque command source selection

Pr.804 Torque command source selection
Pr.806 Torque command value (RAM,EEPROM)
When you selected torque control, you can choose the torque
command.
Pr. Setting
Number Range
0
Torque command by terminal 1 analog input
(initial value)
Torque command by parameter
1
Pr.805 or Pr.806 setting (-400% to 400%)
Torque command by CC-Link communication (FR-
A7NC)
3
Refer to the instruction manual of the option "FR-
804 A7NC (option)" for details.
Digital input from the option (FR-A7AX)
4 Refer to the instruction manual of "FR-A7AX
(option)" for details.
Torque command by CC-Link communication (FR-
5
A7NC)
Refer to the instruction manual of the option "FR-
6
A7NC (option)" for details.
Digital setting of the torque command can be made
600 to
805
by setting Pr.805 (RAM) or Pr.806 (RAM, EEPROM).
1400%
(Setting from communication option, etc. can be
made.)
600 to
In this case, set the speed limit value to an
806
1400%
appropriate value to prevent overspeed.
Torque command by terminal1 analog input
The torque command value for the analog input of the terminal 1
varies with C16, C17(Pr.919), C18, C19 (Pr.920) as shown below.
Torque command value
C16
(Pr.920)
C18
(Pr.919)
C19
(Pr.919)
Torque command by parameter
The relationship between the Pr.805 or Pr.806 setting and actual
torque command value at this time is shown below. On the
assumption that 1000% is 0%, the torque command is indicated by
an offset from 1000%.
Torque command value
400%
600%
69
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.805 Torque command value (RAM)
Description
Analog input
(terminal 1)
C17
(Pr.920)
Pr.805,Pr.806
settings
1000% 1400%
Torque command value
=Pr.805(or Pr.806)-1000%
-400%
Pr.
Pr.
807 to 809

Speed limit during torque control

Pr.807 Speed limit selection
Pr.809 Reverse rotation speed limit
When you selected torque control, set the speed limit value to
prevent the load torque from becoming less than the torque
command value, resulting in motor overspeed.
Select the speed limit input method using Pr.807 .
Pr.807
Setting
0
Use the speed command value during speed control as speed
(initial
limit.
value)
According to Pr.808 and Pr.809, set the speed limit in forward and
reverse rotation directions individually. When the reverse rotation
1
speed limit is 9999, the setting is the same as that of the torque
limit in forward rotation direction.
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.
Speed
Pr. 7 Speed limit value
*
Speed
STF
(Forward rotation
command)
Speed limit Torque control operation
operation
(Speed control)
OL
ON
*When the speed limit activates, torque according to the commanded is not developed.
Pr.
Pr.
810, 812 to 817
Refer to the section about Pr.22.
Pr.
Pr.
818, 819

Easy gain tuning selection

Pr.818 Easy gain tuning response level setting
The ratio of the load inertia to the motor inertia (load inertia
moment ratio) is estimated in real time from the torque command
and speed during motor operation to automatically set gain
(Pr.422, Pr.820, Pr.821, Pr.828) for each control from that ratio and
response level setting (Pr.818).
Manually input the load inertia ratio during real sensorless vector
control.
Time and effort of making gain adjustment can be reduced.
Set the response level for finding each control gain from the load inertia
ratio.
Pr.818
Description
Setting Range
1: Slow response
↓
1 to 15
15: Fast response
Valid/invalid of easy gain tuning can be selected.
Pr.819
Setting Range
0 No tuning
With load estimation (only under
1
vector control)
2 With tuning (manual load input)
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.808 Forward rotation speed limit
Description
Pr. 8
*
*
Time
Speed limit Torque Speed limit
operation control operation
(Speed control) operation (Speed control)
ON ON
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.819 Easy gain tuning selection
Description