Mitsubishi Electric FR-F820-00046 Instruction Manual page 352

• For the LF signal, set "98 (positive logic) or 198 (negative logic)" in any of Pr.190 to Pr.196 (Output terminal function
selection) to assign the function to the output terminal.
Set frequency
60Hz
Current input
decrease detection
∗1
2mA 4mA
Normal use range
*1 When Pr.573 ≠ "9999" and the terminal 4 (terminal 2) input is calibrated to 2 mA or less in C2 (Pr.902) (C5 (Pr.904)), the operation set in Pr.573
is applied to the frequency at the input of 2 mA or less.
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 Continuing operation when the analog current input is lost (Pr.573 = "1,
4", Pr.777)
• When Pr.573 = "1", operation continues at the output frequency before the current input loss.
• When Pr.573 = "4" and Pr.777 ≠ "9999", operation continues at the frequency set in Pr.777.
• When the start command is turned OFF during current input loss, the inverter output decelerates the motor to a stop
immediately, and the operation is not restarted even if a start command is input again.
• When the current input is restored, the LF signal is turned OFF, and operation is performed according to the current input.
• The following is the operation example during External operation.
Output frequency
Analog input
20mA
4mA
STF
LF signal
• The following is the operation example during PID control (reverse action) operation.
Output frequency
20mA
Set point (fixed)
Measured value
4mA
STF
LF signal
PID signal
When C3 (C6) = 0%
20mA
Analog input
Pr.573=1 : Operation continued with the frequency before being lost
Pr.573=4 : Operation continued with Pr.777 setting
Return
Input current
decrease
3mA
2mA
Pr.573=1 : Operation continued with the frequency before being lost
Pr.573=4 : Operation continued with Pr.777 setting
Input current
decrease
Return
3mA
2mA
On during input decrease
Time
Time
5.9 (T) Multi-function input terminal parameters
1
2
3
4
5
6
7
8
9
10
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5. PARAMETERS