4Ma Input Check Of Current Input (Pr. 573) - Mitsubishi Electric FR-A700 Instruction Manual

Frequency/torque setting by analog input (terminals 1, 2 and 4)
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.
Pr.
Name
No.
573
4mA input check selection
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.
Set frequency
Current input decrease
detection
*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.
6 - 400
Initial Setting
Description
Value Range
When the current input drops to or below
2mA, the LF signal is output and inverter
1 continues operation at the frequency
9999
(average value) just before current
reaches 2mA.
9999 4mA input is not checked.
When C3 (C6) = 0%
Normal use range
Fig. 6-196:
4mA input check of current input
Analog
input
Parameter
Refer to
Parameters referred to
Section
73 Analog input 6.20.3
selection
267 Terminal 4 input 6.20.2
selection
I001196E