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Misoperation prevention and parameter
setting restriction
4
PARAMETERS
4.22 Misoperation prevention and parameter setting restriction
4.22.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75)
(1) Reset selection
• You can select the operation timing 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 protective function is activated.
Purpose Parameter that must be Set Refer to Page
Limit reset function
Trips when PU is disconnected
Stop from PU
Reset selection/disconnected
PU detection/PU stop selection
Pr. 75 305
Prevention of parameter rewrite
Parameter write disable
selection
Pr. 77 307
Prevention of reverse rotation of the
motor
Reverse rotation prevention
selection
Pr. 78 308
Display necessary parameters
Display of applied parameters
and user group function
Pr. 160, Pr. 172 to Pr. 174 308
Parameter restriction using password Password function Pr. 296, Pr. 297 310
Control of parameter write by
communication
EEPROM write selection Pr. 342 334
You can select the reset input acceptance, disconnected PU (FR-DU07/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 are set.
This parameter allows its setting to be changed during operation in any operation mode even if "0 (initial value) or 1" is set in Pr. 77 Parameter write
selection. 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 is always enabled
If the PU is disconnected, operation
will be continued.
Pressing decelerates the motor to
a stop only in the PU operation mode.
1
Reset input enabled only when a
fault occurs
2 Reset input is always enabled
When the PU is disconnected, the
inverter trips.
3
Reset input enabled only when a
fault occurs
14
(initial
value)
Reset input is always enabled
If the PU is disconnected, operation
will be continued.
Pressing decelerates the motor to
a stop in any of the PU, External and
communication operation modes.
15
Reset input enabled only when a
fault occurs
16 Reset input is always enabled
When the PU is disconnected, the
inverter trips.
17
Reset input enabled only when a
fault occurs
CAUTION
⋅ When the reset signal (RES) is input during operation, the motor coasts since the inverter being reset shuts off the output.
Also, the cumulative value of the electronic thermal relay function and regenerative brake duty is cleared.
⋅ The reset key of the PU is valid only when the protective function is activated, independently of the Pr. 75 setting.