Mitsubishi Electric FR-A820-00046 Instruction Manual page 598

(T) Multi-Function Input Terminal Parameters
Continue operation at analog current input loss (Pr. 573 = "1, 4", Pr. 777)
● When Pr. 573 = "1", operation is continued with the output frequency before the current input loss.
● When Pr. 573 = "4" and Pr. 777 ≠ "9999", operation is continued with frequency set in Pr. 777.
● When the start command is turned OFF during the input current loss, deceleration stop is
immediately performed, and the operation is not restored even if 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.
● External operation
Analog input
Fig. 5-203:
● PID control (reverse action)
Fig. 5-204:
NOTE When the setting is changed to continuously operate after the input current loss (Pr. 573 = "1, 4"),
the motor will operate as the frequency before loss is 0 Hz.
5 - 418
Output frequency
20 mA
4 mA
LF signal
4mA input check during external operation (Pr. 573 = 1 or 4)
Output frequency
20 mA
Set point (fixed)
Measured value
4 mA
LF signal
PID signal
4mA input check during PID control (reverse action, Pr. 573 = 1 or 4)
Pr. 573 = 1: Operation continued with the frequency before being lost
Pr. 573 = 4: Operation continued with Pr. 777 setting
Return
Input current
decrease
3 mA
2 mA
Pr. 573 = 1: Operation continued with the frequency before being lost
Pr. 573 = 4: Operation continued with Pr. 777 setting
Input current
decrease
Return
3 mA
2 mA
On during input decrease
Parameters
Time
I001197E
Time
I001198E