# Mitsubishi Electric FR-A700 Instruction Manual Page 163

Fr-a700 series to 03460-na/09620-na/00330-n4/00170-n4.

(5) Stall prevention operation level setting by terminal 1 (terminal 4) (analog variable) (Pr. 148,
Pr. 149, Pr. 858, Pr. 868)
Current limit level (%)
200%
Initial setting
150%
100%
50%
0V
(-5V/10VDC)
0mA
Set the current limit level at 0V input
voltage (input current 0mA) using Pr. 148.
Pr. 858 Setting
Pr. 868 Setting
0
(initial value)
1
2
0
3
(initial value)
4
*1
5
6
9999
0
(initial value)
1
2
1
3
4
*1
5
6
9999
0
(initial value)
1
2
4
3
*2
4
*1
5
6
9999
9999
*1 When Pr. 868 = "4" (analog stall prevention), other functions of terminal 1 (auxiliary input, override function, PID control) do not function.
*2 When Pr. 858 = "4" (analog stall prevention), PID control and speed command from terminal 4 do not function even if the AU signal turns on.
*3 When "4" (stall prevention) is set in both Pr. 858 and Pr. 868, function of terminal 1 has higher priority and terminal 4 has no function.
REMARKS
⋅ The fast response current limit level cannot be set.
(6) To further prevent an alarm stop (Pr. 154)
⋅ When Pr. 154 is set to "0", the output voltage reduces during stall prevention operation. By making setting to reduce
the output voltage, an overcurrent trip can further become difficult to occur.
⋅ Use this function where a torque decrease will not pose a problem.
Pr. 154 Setting
0
Output voltage reduced
1
Output voltage not reduced
(initial value)
Set the current limit level at 10V/5V input
power (input current 20mA) using Pr. 149.
Input voltage (V)
(5V/10VDC)
Input current (mA)
(20mA)
V/F, Advanced Magnetic Flux Vector Control
Terminal 4 function
Frequency command
(AU signal-ON)
Magnetic flux command
Magnetic flux command
Stall prevention
*3
Stall prevention
Description
Adjust the output torque of the motor (current)
⋅ To set the stall prevention operation level using
function assignment to "4".
⋅ Input 0 to 5V (or 0 to 10V) to terminal 1. Select 5V or
"1" (initial value), 0 to ±10V is input.
⋅ To set stall prevention operation level using terminal
4 (analog current input), set "4" in Pr. 858 Terminal 4
function assignment.
Input 0 to 20mA to terminal 4. The AU signal need
not be turned on.
⋅ Set the current limit level at the input voltage of 0V
(0mA) in Pr. 148 Stall prevention level at 0V input
⋅ Set the current limit level at the input voltage of 10V/
5V (20mA) in Pr. 149 Stall prevention level at 10V input.
Terminal 1 function
Frequency auxiliary
Magnetic flux command
Stall prevention
Torque bias
Magnetic flux command
Stall prevention
Torque bias
Frequency auxiliary
Magnetic flux command
Stall prevention
Torque bias
4
153

#### This manual is also suitable for:

Fr-a720-00030Fr-a740-00015