Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Frequency/torque setting by analog input (terminals 1, 2 and 4) Parameter
6 - 400
6.20.7 4mA input check of current input (Pr. 573)
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.
Operation at a current input decrease continues (Pr. 573 = 1)
When the input current of terminal 4 (terminal 2) falls to 2mA or below, output minor fault signal
(LF) is output. 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" (source logic) or "198" (sink logic) in Pr. 190 to Pr. 196 "Output ter-
minal 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.
*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.
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
573
4mA input check selection 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.
73
267
Analog input
selection
Terminal 4 input
selection 6.20.3
6.20.2
9999 4mA input is not checked.
Fig. 6-196:
4mA input check of current input
I001196E
Normal use range
Analog
input
Set frequency
When C3 (C6) = 0%
Current input decrease
detection