Mitsubishi Electric FR-F820-00077 Instruction Manual page 358

(H) Protective function parameter
Stall prevention operation level setting (analog variable) from terminal 1 (terminal 4)
(Pr. 148, Pr. 149, Pr. 858, Pr. 868)
● 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).
Fig. 5-69:
Pr. 858 setting
(initial value)
Tab. 5-82:
When Pr. 868 = "4" (analog stall prevention), the other functions for terminal 1 (auxiliary input,
override function, PID control) will be disabled.
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.
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.
5 - 186
Current limit level (%)
200%
Initial value
150%
100%
50%
0 V
(–5 V/10 V DC)
0 mA
Stall prevention operation level setting by terminal 1
Pr. 868 setting
0
(initial value)
0
4
9999
0
(initial value)
4
4
9999
⎯
9999
Functions of terminal 1 and 4 in dependence of the control mode
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux
Set the current limit level at 10 V/5 V input
power (input current 20 mA) using Pr. 149.
Input voltage (V)
Input current (mA)
(5 V/10 V DC)
(20 mA)
Set the current limit level at 0 V input
voltage (input current 0 mA) using Pr. 148.
V/F, Advanced magnetic flux vector control
Terminal 4 function
Frequency command
(AU signal-ON)
Stall prevention
⎯
Stall prevention
⎯
Parameters
I002600E
Terminal 1 function
Auxiliary frequency
Stall prevention
⎯
Auxiliary frequency
Stall prevention
⎯
⎯