Mitsubishi Electric FR-A700 Instruction Manual page 343

Parameter
Pr. 858
(initial value)
Tab. 6-31: Functions of terminal 1 and 4 in dependence of the control mode
When Pr. 868 = "4" (analog stall prevention), other functions of terminal 1 (auxiliary input,
override function, PID control) do not function.
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.
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.
NOTE The fast-response current limit level cannot be set.
To further prevent an alarm stop (Pr. 154)
When Pr. 154 is set to "0", the output voltage reduces during stall prevention operation. By mak-
ing setting to reduce the output voltage, an over current trip can further become difficult to occur.
Use this function where a torque decrease will not pose a problem.
Pr. 154 Setting
1 (Initial value)
Tab. 6-32: Settings of parameter 154
FR-A700 EC
Pr. 868
0
(initial value)
1
2
0
3
4
5
6
9999
0
(initial value)
1
2
3
1
4
5
6
9999
0
(initial value)
1
2
3
4
4
5
6
9999
9999 —
Description
0 Output voltage reduced
Output voltage not reduced
Adjust the output torque of the motor (current)
Real Sensorless Vector Control (Speed Control)
Terminal 4 function
Frequency command
(AU signal-ON)
Magnetic flux command
—
Magnetic flux command
Stall prevention
—
—
Stall prevention
—
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
—
—
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