Misoperation Prevention And Parameter Setting Restriction; Reset Selection/Disconnected Pu Detection/Pu Stop Selection (Pr. 75) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

4.22 Misoperation prevention and parameter setting restriction

Purpose
Limit reset function
Trips when PU is disconnected
Stop from PU
Prevention of parameter rewrite
Prevention of reverse rotation of the
motor
Display necessary parameters
Parameter restriction using password
Control of parameter write by
communication

4.22.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75)

You can select the reset input acceptance, disconnected PU (FR-DU07/FR-PU04/FR-PU07) connector detection
function and PU stop function.
Parameter
Name
Number
Reset selection/disconnected
75
PU detection/PU stop selection
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
Reset Selection
Setting
0 Reset input is always enabled
Reset input enabled only when a
1
fault occurs
2 Reset input is always enabled
Reset input enabled only when a
3
fault occurs
14
(initial Reset input is always enabled
value)
Reset input enabled only when a
15
fault occurs
16 Reset input is always enabled
Reset input enabled only when a
17
fault occurs
(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.
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.
Misoperation prevention and parameter
Parameter that must be Set
Reset selection/disconnected
PU detection/PU stop selection
Parameter write disable
selection
Reverse rotation prevention
selection
Display of applied parameters
and user group function
Password function
EEPROM write selection
Initial
Setting Range
Value
14 0 to 3, 14 to 17
Disconnected PU Detection
If the PU is disconnected, operation
will be continued.
When the PU is disconnected, the
inverter trips.
If the PU is disconnected, operation
will be continued.
When the PU is disconnected, the
inverter trips.
setting restriction
Refer to Page
Pr. 75
Pr. 77
Pr. 78
Pr. 160, Pr. 172 to Pr. 174
Pr. 296, Pr. 297
Pr. 342
Description
For the initial value, reset always enabled,
without disconnected PU detection, and
with PU stop function are set.
PU Stop Selection
Pressing decelerates the motor to
a stop only in the PU operation mode.
Pressing decelerates the motor to
a stop in any of the PU, External and
communication operation modes.
305
307
308
308
310
334
4
305