Checking Of Current Input On Analog Input Terminal - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.12.7

Checking of current input on analog input terminal

When current is input to the analog input terminal 2 and terminal 4, operation when the current input
has gone below the specified level (loss of analog current input) can be selected. It is possible to con-
tinue the operation even when the analog current input is lost.
Pr.
573
T052
777
T053
778
T054
Analog current input loss condition (Pr. 778)
● When the condition of current input to the terminal 4 (terminal 2) continues to be 2 mA or less
for Pr. 778 setting time, it is considered as loss of analog current input and alarm (LF) signal is
turned ON. The LF signal will turn OFF when the current input becomes 3 mA or higher.
● For the LF signal, set "98 (positive logic) or 198 (negative logic)" in any of Pr. 190 to Pr. 196 "output
terminal function selection" to assign the function.
60 Hz
When the Pr. 573 ≠ "9999" and terminal 4 (terminal 2)
is calibrated to 2 mA or less with C2 (Pr. 902)
(C5 (Pr. 904)), analog input frequency that is 2 mA or
less will become input current loss, thus it will not be
as the bias setting frequency.
NOTE Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection)
may affect the other functions. Set parameters after confirming the function of each terminal.
FR-A800
Name
4 mA input check selection
4 mA input check operation
frequency
4 mA input check filter
Set frequency
When C3 (C6) = 0 %
Current input
decrease detection
2 mA 4 mA
Normal use range
(T) Multi-Function Input Terminal Parameters
Initial value Setting range
1
2
9999
3
4
9999
0 to 590 Hz
9999
9999
0 s 0 to 10 s
Fig. 5-202:
4mA input check of current input
20 mA
Analog
input
Description
Continues the operation with output
frequency before the current input loss.
4 mA input fault is activated when the
current input loss is detected.
Decelerates to stop when the current
input loss is detected. After it is stopped,
4 mA input fault (E.LCI) is activated.
Continues operation with the Pr. 777
setting.
No current input check
Set the running frequency for current
input loss. (Valid when Pr. 573 = "4")
No current input check when Pr. 573 = "4"
Set the current input loss detection time.
I001196E
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