Mitsubishi Electronics FR-F700-NA ユーザーズマニュアル

The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190.)

....

Specifications differ according to the date assembled.  Refer to page 400 to check the SERIAL number.

When inputting 4 to 20mA current to terminal 2 or terminal 4, decrease in analog current input is detected to
enable continuous operation even if input has decreased.

9999

1

When the current input drops to or below 2mA, the LF 
signal is output and inverter continues operation at the 
frequency (average value) just before current reaches 
2mA.

2

When the analog input current drops to or below 2mA, 
the fault (E.LCI) is output and the inverter output is 
shutoff.

3

When the analog input current drops to or below 2mA, 
the alarm signal (LF) is output, and the fault (E.LCI) is 
output after deceleration to a stop. When the current 
rises to or above 3mA during the deceleration, the 
motor accelerates again to the set point and resumes 
normal operation.

4

When the analog input current drops to or below 2mA, 
the alarm signal (LF) is output and the inverter 
continues operation at the Pr. 777 setting.

9999

4mA input is not checked.

9999

0 to 400Hz

Set the frequency to continue the operation when the 
analog input current drops to or below 2mA while Pr. 573 
="4."

9999

4mA input is not checked while Pr. 573 = "4."

0

0 to 10s

Detection for an analog input current drop is performed 
for the time period of Pr. 778 while the analog input 
current 

≤ 2mA.

Detection for an analog input current drop is cancelled 
for the time period of Pr. 778 while the analog input 
current > 3mA.
Pr. 778 =0: Immediately detected or the detection is 
cancelled.

* When Pr.573 = "1", input decrease is detected (LF signal output) even if

the analog input value to bias frequency of terminal 2 or terminal 4 is set
to 2mA or less using C2 (Pr. 902) or C5 (Pr. 904) and the value is not as
bias frequency settings.

(1) Operation continuation  (Pr. 573 = "1")

⋅ When the input current of terminal 4 (terminal 2) falls

2mA or below, output alarm output signal (LF) is output.

⋅ When the current falls below 2mA, the output

frequency (average value) before detection is retained
and operation at the retained frequency continues. 

⋅ When the current input increases above 3mA, the

LF signal output is turned OFF and the inverter
operates according to the current input.

⋅ For the LF signal, set "98 (positive logic) or 198

(negative logic)" in Pr. 190 to Pr. 196 (output terminal
function selection) and assign functions to the output
terminal.

⋅ Since turning OFF the start command clears the

retained frequency, the inverter does not operate at
the retained frequency even if restarted.

4mA

2mA

60Hz

20mA

Set frequency

Analog input

When C3(C6) = 0%

Normal use range

Current input
decrease detection

*