Response Level Of Analog Input And Noise Elimination (Pr.74) - Mitsubishi Electric FR-E700EX Instruction Manual

Speed setting by analog input (terminal 2, 4)
REMARKS
Pr.178 STF terminal function selection must be set to "60" (or Pr.179 STR terminal function selection must be set to "61"). (all are initial
values)
The motor will not rotate ... Why?
Check that [EXT] is ON.
[EXT] is valid when Pr.79 = "0" (initial value) and "2".
Use to ON [EXT].
Check that wiring is correct. Check once again.
Change the speed (0r/min) of the minimum value of potentiometer (at 0V initial value)
Adjust the speed in calibration parameter C2 Terminal 2 speed setting bias speed. (Refer to page 173)

4.15.3 Response level of analog input and noise elimination (Pr.74)

The time constant of the primary delay filter can be set for the external speed command (analog input (terminal 2, 4)
signal).
Parameter
number
74 Input filter time constant
The above parameters can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)
 Valid for eliminating noise of the speed setting circuit.
 Increase the filter time constant if steady operation cannot be performed due to noise.
A larger setting results in slower response. (The time constant can be set between approximately 5ms to 1s with the setting
of 0 to 8.)
172
Name Initial value Setting range
1 0 to 8
Description
Primary delay filter time constant for the
analog input.
A larger setting results in a larger filter.