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Misoperation prevention and parameter setting restriction
4.17 Misoperation prevention and parameter setting restriction
4.17.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75)
(1) Reset selection
You can select the enable condition of reset function (RES signal, reset command through communication) input.
When Pr. 75 is set to any of "1, 3, 15, 17", a reset can be input only when the inverter is tripped.
(2) Disconnected PU detection
This function detects that the PU (FR-PU04/FR-PU07) has been disconnected from the inverter for longer than 1s and
causes the inverter to provide a fault output (E.PUE) and come to trip.
When Pr. 75 is set to any of "0, 1, 14, 15", operation is continued even if the PU is disconnected.
Purpose Parameter that should be Set Refer to Page
Limits reset function
Trips when PU is disconnected
Stops from PU
Reset selection/disconnected PU
detection/PU stop selection
Pr. 75
158
Prevention of parameter rewrite Parameter write disable selection Pr. 77
161
Prevention of reverse rotation of the motor Reverse rotation prevention selection
Pr. 78
162
Displays necessary parameters Display of applied parameters Pr. 160
162
Parameter restriction with using
password
Password function Pr. 296, Pr. 297
163
Control of parameter write by
communication
EEPROM write selection Pr. 342
187
You can select the reset input acceptance, disconnected PU (FR-PU04/FR-PU07) connector detection function and PU
stop function.
Parameter
Number
Name Initial Value Setting Range Description
75
Reset selection/
disconnected PU detection/
PU stop selection
14 0 to 3, 14 to 17
For the initial value, reset always enabled,
without disconnected PU detection, and
with PU stop function.
The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 162)
The Pr. 75 value can be set any time. Also, if parameter (all) clear is executed, this setting will not return to the initial value.
Pr. 75
Setting
Reset Selection Disconnected PU Detection PU Stop Selection
0 Reset input normally enabled
When the PU is disconnected,
operation is continued.
Pressing decelerates the motor
to a stop only in the PU operation
mode.
1
Reset input is enabled only when the fault
occurs.
2 Reset input normally enabled
When the PU is disconnected, the
inverter trips.
3
Reset input is enabled only when the fault
occurs.
14
(initial value)
Reset input normally enabled
When the PU is disconnected,
operation is continued.
Pressing decelerates the motor
to a stop in any of the PU, external
and communication operation modes.
15
Reset input is enabled only when the fault
occurs.
16 Reset input normally enabled
When the PU is disconnected, the
inverter trips.
17
Reset input is enabled only when the fault
occurs.
NOTE
When the reset signal (RES) is input during operation, the motor coasts since the inverter being reset shuts off the output.
When reset is performed, cumulative values of electronic thermal O/L relay, and regenerative brake duty are cleared.
The reset key of the PU is only valid when the inverter is tripped, independently of the Pr. 75 setting.
REMARKS
When the PU has been disconnected since before power-on, it is not judged as a fault.
To make a restart, confirm that the PU is connected and then reset the inverter.
The motor decelerates to a stop when the PU is disconnected during PU Jog operation with Pr. 75 set to any of "0, 1, 14, 15"
(which selects operation to be continued if the PU is disconnected).
When RS-485 communication operation is performed through the PU connector, the reset selection/PU stop selection function
is valid but the disconnected PU detection function is invalid.