Input Filter Time Constant (Pr. 74); Reset Selection/Pu Disconnection Detection/Pu Stop Selection (Pr. 75) - Mitsubishi Electric FR-A520-0.4K Instruction Manual

4.2.31 Input filter time constant (Pr. 74)

Pr. 74 "filter time constant"
You can set the input section's internal filter constant for an external voltage or current frequency setting
signal.
Effective for eliminating noise in the frequency setting circuit.
Increase the filter time constant if steady operation cannot be performed due to noise. A larger setting
results in lower response. (The time constant can be set between approximately 1ms to 1s with the setting
of 0 to 8. A larger setting results in a larger filter time constant.)
Parameter Factory
Number Setting
74 1

4.2.32 Reset selection/PU disconnection detection/PU stop selection (Pr. 75)

Pr. 75 "reset selection/disconnected PU detection/PU stop selection"
You can select the reset input acceptance, PU (FR-DU04/FR-PU04) connector disconnection detection
function and PU stop function.
Reset selection
PU disconnection detection : When it is detected that the PU (FR-DU04/FR-PU04) connector is
PU stop selection
Parameter Factory
Number Setting
75 14
<Setting>
Pr. 75
Reset Selection
Setting
0 Reset input normally enabled.
Reset input enabled only when the
1
protective function is activated.
2 Reset input normally enabled.
Reset input enabled only when the
3
protective function is activated.
14 Reset input normally enabled.
Reset input enabled only when the
15
protective function is activated.
16 Reset input normally enabled.
Reset input enabled only when the
17
protective function is activated.
Setting Range
0 to 8
: You can select the reset function input timing.
disconnected from the inverter for more than 1s, the inverter outputs an
alarm code (E.PUE) and comes to an alarm stop.
: When an alarm occurs in any operation mode, you can stop the motor from
the PU by pressing the
Setting Range
0 to 3, 14 to 17
PU Disconnection Detection
If the PU is disconnected, operation
will be continued.
When the PU is disconnected, the
inverter output is shut off.
If the PU is disconnected, operation
will be continued.
When the PU is disconnected, the
inverter output is shut off.
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PARAMETERS
STOP
key.
RESET
PU Stop Selection
Pressing the
decelerates the motor to a stop only in
the PU operation mode.
Pressing the
decelerates the motor to a stop in any
of the PU, external and communication
operation modes.
STOP
key
RESET
STOP
key
RESET