Mitsubishi Electric 800 Series Instruction Manual page 264

 Stall prevention operation level setting (analog variable) from terminal 1
(terminal 4) (Pr.148, Pr.149, Pr.858, Pr.868)
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux
• To use the terminal 1 (analog voltage input) to set the stall prevention operation level, set Pr.868 Terminal 1 function
assignment = "4". Then, input a 0 to 5 V (or 0 to 10 V) to the terminal 1. To choose whether 5 V or 10 V, use Pr.73 Analog
input selection. In the initial status, Pr.73 = "1 (initial value)" is set to choose 0 to ±10 V input.
• When setting the stall prevention operation level from terminal 4 (analog current input), set Pr.858 Terminal 4 function
assignment = "4".
• Input 0 to 20 mA into terminal 4. There is no need to turn ON the AU signal.
• Set Pr.148 Stall prevention level at 0 V input to the current limit level when input voltage is 0 V (0 mA).
• Set Pr.149 Stall prevention level at 10 V input to the current limit level when input voltage is 10 V/5 V (20 mA).
Current limit level (%)
200%
150%
100%
50%
0 V
(-5 V/10 VDC)
0 mA
Set the current limit level at 0 V input
voltage (input current 0 mA) using Pr.148.
Pr.858 setting Pr.868 setting
0 0
(initial value) (initial value)
*1
4
9999
0
*2
4
(initial value)
*1
4
9999
9999 ―
*1 When Pr.868 = "4" (analog stall prevention), the other functions for terminal 1 (auxiliary input, override function, PID control) will be disabled.
*2 When Pr.858 = "4" (analog stall prevention), PID control and speed commands using terminal 4 will not operate, even if the AU signal turns ON.
*3 When both of Pr.858 and Pr.868 are set to "4" (stall prevention), terminal 1 functions take priority and terminal 4 has no function.
NOTE
• The fast-response current limit cannot be set.
• To change the stall prevention operation level with the analog signal under PM motor control, set C16 to C19 or C38 to
C41 to calibrate terminal 1 or terminal 4. (Refer to
Set the current limit level at 10 V/5 V input
power (input current 20 mA) using Pr.149.
Input voltage (V)
(5 V/10 VDC)
Input current (mA)
(20 mA)
Terminal 4 function
Frequency command (AU signal-ON)
Stall prevention
*3
―
Stall prevention
―
page
V/F, Advanced magnetic flux vector control
Auxiliary frequency
Stall prevention
―
Auxiliary frequency
Stall prevention
―
―
333.)
Terminal 1 function
5. PARAMETERS
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
263