Checking Of Current Input On Analog Input Terminal - Mitsubishi Electric FR-F820-00046 Instruction Manual

(c) Adjustment by changing the stall prevention operation level only without adjusting the gain voltage (current).
(Example of changing the gain value from 150% to 130%)
Operating procedure
1.
Selecting the parameter
Turn until "
Press to read the present set value. (150.00%)
2.
Changing the stall prevention operation level
Turn to change the set value to "
Press to confirm the selection. "
3.
Selecting the mode and the monitor item
Press three times to select the monitor mode, and change the monitor item to the frequency.
4.
Start
Turn ON the start switch (STF or STR) to apply a voltage across terminals 1 and 5 (4 and 5),
Operation is performed with 130% stall prevention operation level.
NOTE
• If the voltage (current) values at the gain and bias levels are too close to each other, an error ("
• For operation outline of the parameter unit (FR-PU07), refer to the Instruction Manual of the FR-PU07.
• Use the calibration parameter C16 (Pr.919) or C38 (Pr.932) to set the bias level. (Refer to
Parameters referred to
Pr.73 Analog input selection, Pr.267 Terminal 4 input
Pr.79 Operation mode selectionpage 228
Pr.858 Terminal 4 function assignment, Pr.868 Terminal 1 function
5.9.7

Checking of current input on analog input terminal

When current is input to the analog input terminal 2 or terminal 4, the input current can be checked and the operation when the
input falls below the specified level (the analog current input is lost) can be selected. The operation can be continued even
when the analog current input is lost.
Pr.
573
4 mA input check selection
T052
777 4 mA input fault operation
T053 frequency
778
4 mA input check filter
T054
 Analog current input loss condition (Pr.778)
• When the current input to terminal 4 (terminal 2) continues to be 2 mA or less for the period set in Pr.778, it is considered
as loss of analog current input and the Alarm (LF) signal is turned ON. The LF signal turns OFF when the current input
becomes 3 mA or higher.
350
5. PARAMETERS
5.9 (T) Multi-function input terminal parameters
" (Pr.920) appears for terminal 2, or "
selectionpage 330
Initial
Name
value
9999
9999
0 s
" (130.00%)
" and " (
assignmentpage 334
Setting
range
Operation continues with output frequency before the current
1
input loss.
4 mA input fault (E.LCI) is activated when the current input loss
2
is detected.
The inverter output decelerates the motor to a stop when the
3 current input loss is detected. After the motor is stopped, 4 mA
input fault (E.LCI) is activated.
4 Operation continues at the frequency set in Pr.777.
9999 No current input check
Set the frequency for operation when the current input is lost.
0 to 590 Hz
(Valid when Pr.573 = "4")
9999 No current input check when Pr.573 = "4"
0 to 10 s Set the current input loss detection time.
" (Pr.933) for terminal 4.
)" are displayed alternately.
") may be indicated.
page 346.)
Description