Torque Limit Level; Input Compensation Of Multi-Speed And Remote Setting - Mitsubishi Electric FR-A700 Manual

By setting "9999" (initial value) in Pr.23 Stall prevention operation level
compensation factor at double speed, the stall prevention operation
level is constant at the Pr.22 setting up to 400Hz.
Pr.22
Pr.66
Setting "9999" in Pr.49 Second stall prevention operation frequency and
turning the RT signal on make Pr.48 Second stall prevention operation
current valid.
Setting a value other than "0" in Pr.115 Thrid stall prevention operation
frequency and turning the X9 signal on make Pr.114 Third stall
prevention operation current valid.
The stall prevention operation level from 0Hz to the output frequency
set in Pr.49 (Pr.115) can be set in Pr. 48 (Pr.114).
Set frequency exceeds Pr. 49(Pr.115)
Output
frequency (Hz)
Output
frequency
Set
frequency
Pr.49
(Pr.115)
Stall
prevention
Pr. 22
level
used
Pr.49 Pr.115
Setting Setting
The second (third) stall prevention function is not
0 (initial value)
activated.
The second (third) stall prevention function is
0.01Hz to 400Hz
activated according to the frequency.
The second stall prevention function is performed
according to the RT signal.

9999
RT signal on...Stall level Pr.48
RT signal off...Stall level Pr.22
Stall prevention operation and fast response current limit function
can be limitted according to the operation condition using Pr.156.
When real sensorless vector control is selected using Pr.800, Pr.22
serves as a torque limit level.
45
When setting parameters, refer to the instruction manual (applied) and understand instructions.
When Pr.23=9999
Pr.23
400Hz
Output frequency (Hz)
Set frequency is Pr. 49 (Pr.115)or less
Output
frequency (Hz)
Output
Pr.49
frequency
(Pr.115)
Set
frequency
Time
Pr. 48
(Pr.114)
Pr. 48
Pr. 22
used (Pr.114)
used
used
Operation
Pr.
Pr.
22, 803, 810 to 817, 858, 868, 874

Torque limit level

Pr.22 Torque limit level
Pr.803 Constant power range torque characteristic selection
Pr.810 Torque limit input method selection
Pr.812 Torque limit level (regeneration)
Pr.814 Torque limit level (4th quadrant)
Pr.816 Torque limit level during acceleration
Pr.858 Terminal 4 function assignment
Pr.874 OLT level setting
This function limits the output torque to the predetermined value
during speed control under real sensorless vector control or vector
control.
Set the torque limit level within the range 0 to 400% in Pr.22 .
If the TL signal is turned on, torque limit level 2 (Pr.815) functions.
You can select whether the torque limit level is set using parameters
or analog input teminals (terminal 1, 4).
In addition, you can set torque limit level for forward (power driving/
regeneration) and reverse (power driving/regeneration) operation
individually.
Pr. Setting
Number Range
0
(initial value)
810
1
0 to 400%
Time
812
9999
(initial value)
0 to 400%
813
9999
(initial value)
0 to 400%
814
9999
(initial value)
To set torque limit level using an analog signal from terminal 1
(terminal 4) , set "1" in Pr.810 and "4" in Pr.868 (Pr.858).
Torque limit value during acceleration/deceleration can be set using
Pr.816 and Pr.817.
You can select whether the torque limit in the constant output range
be constant torque limit or constant output limit using Pr.803.
This function can make an alarm stop if the torque limit is activated
to stall the motor. Set the output torque at which an alarm stop is
made in Pr.874 .
Using Pr.811, the setting increments of the parameter-set torque limit
can be changed from 0.1% to 0.01% increments. (valid during vector
control)
When V/F control and advanced magnetic flux vector control are selected
using Pr.800 , Pr.22 serves as a stall prevention operation level.
Pr.
Pr.
24 to 27
Pr.
Pr.
28

Input compensation of multi-speed and remote setting

Pr.28 Multi-speed input compensation selection
By inputting the frequency setting compensation signal (terminal 1,
2), speed (frequency) compensation can be applied for the speed
setting such as the multi-speed setting and remote setting
function.
Pr.28 Setting
0 (initial value)
1
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.811 Set resolution switchover
Pr. 813 Torque limit level (3rd quadrant)
Pr.815 Torque limit level 2
Pr.817 Torque limit level during deceleration
Pr.868 Terminal 1 function assignment
Description
Torque limit by parameter
Torque limit based on the analog input from
terminal 1 and 4.
Set the torque limit level for forward rotation
regeneration.
Pr.22 value is used for limit.
Set the torque limit level for reverse rotation
driving.
Pr.22 value is used for limit.
Set the torque limit level for reverse rotation
regeneration.
Pr.22 value is used for limit.
Refer to the section about Pr. 4.
Description
Without compensation
With compensation