Mitsubishi FR-F720-00046-NA Instruction Manual page 196

Frequency setting by analog input (terminal 1, 2, 4)
During PID control (reverse action) (Analog input current is restored during deceleration while Pr. 573 ="3")
Output frequency
20mA
Set point (fixed)
Measured value
4mA
STF
LF signal
PID signal
(4) Continuing the operation at Pr. 777 setting (Pr. 573 = "4")
When the analog input current drops to or below 2mA, the alarm (LF) is output and the inverter continues operation at
the set frequency of Pr. 777. When the analog input current is restored to or above 3mA, the alarm (LF) is cancelled.
During external operation (Pr. 573 = "4")
Output frequency
Analog input
20mA
4mA
LF signal
During PID control (reverse action) (Pr. 573 = "4")
Output frequency
20mA
4mA
STF
LF signal
PID signal
REMARKS
⋅ When the Pr. 573 and Pr. 777 settings are changed after the detection for an input current drop, the inverter operates with the
changed settings. However, the inverter operates with previous settings while in stop or in alarm.
186
STF
Set point (fixed)
Measured value
An input current drop is detected and the motor decelerates
Normal operation after the current is restored
Input current
decrease
Return
3mA
2mA
OFF during deceleration
Continuing the operation at the set
frequency of Pr. 777
Input current
decrease
2mA
Continuing the operation at the set
frequency of Pr. 777
Input current
decrease
2mA
ON while detecting an input current drop
Time
Time
Return
3mA
Time
Return
3mA
Time
Time