Mitsubishi Electric FR-F800, Instruction Manual

Page: 437 / 834

Parameters (T) Multi-Function Input Terminal Parameters
FR-F800 5 - 275
Continue operation at analog current input loss (Pr. 573 = "1, 4", Pr. 777)
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When Pr. 573 = "1", operation is continued with the output frequency before the current input loss.
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When Pr. 573 = "4" and Pr. 777 ≠ "9999", operation is continued with frequency set in Pr. 777.
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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.
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When the current input is restored, the LF signal is turned OFF, and operation is performed
according to the current input.
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External operation
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PID control (reverse action)
I001197E
Fig. 5-128: 4mA input check during external operation (Pr. 573 = 1 or 4)
I001198E
Fig. 5-129: 4mA input check during PID control (reverse action, Pr. 573 = 1 or 4)
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.
20 mA
4 mA
2 mA
3 mA
Output frequency
Analog input
Pr. 573 = 1: Operation continued with the frequency before being lost
Pr. 573 = 4: Operation continued with Pr. 777 setting
Input current
decrease
LF signal
Time
Return
2 mA
3 mA 4 mA
20 mA
Output frequency
Pr. 573 = 1: Operation continued with the frequency before being lost
Pr. 573 = 4: Operation continued with Pr. 777 setting
Input current
decrease
LF signal
Time
Return
PID signal
Set point (fixed)
Measured value
On during input decrease