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Misoperation prevention and parameter
setting restriction
4.18 Misoperation prevention and parameter setting restriction
4.18.1 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 a fault occurs.
Purpose Parameter that must be Set
Refer to
Page
Limit reset function
Trips stop when PU is disconnected
Stop from PU
Reset selection/disconnected
PU detection/PU stop selection
Pr. 75 198
Prevention of parameter rewrite Parameter write selection Pr. 77 200
Prevention of reverse rotation of the
motor
Reverse rotation prevention
selection
Pr. 78 201
Display necessary parameters
Display of applied parameters
and user group function
Pr. 160, Pr. 172 to Pr. 174 201
Parameter restriction using password Password function Pr. 296, Pr. 297 203
Control of parameter write by
communication
EEPROM write selection Pr. 342 230
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.
⋅The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 201)
⋅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.
* 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.
Pr. 75
Setting
Reset Selection Disconnected PU Detection PU Stop Selection
0 Reset input normally 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 the
protective function is activated
2 Reset input normally enabled.
When the PU is disconnected, the
inverter output is shut off.
3
Reset input enabled only when the
protective function is activated
14
(initial
value)
Reset input normally enabled.
If the PU is disconnected, operation
will be continued.
Pressing decelerates the motor to
a stop in any of the PU, External and
Network operation modes.
15
Reset input enabled only when the
protective function is activated
16 Reset input normally enabled.
When the PU is disconnected, the
inverter output is shut off.
17
Reset input enabled only when the
protective function is activated
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 is cleared.
⋅ The reset key of the PU is valid only when a fault occurs, independently of the Pr. 75 setting.