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Misoperation prevention and parameter
setting restriction
4.22.3 Reverse rotation prevention selection (Pr. 78)
⋅ Set this parameter when you want to limit the motor rotation to only one direction.
⋅ This parameter is valid for all of the reverse rotation and forward rotation keys of the operation panel (FR-DU07),
parameter unit (FR-PU04/FR-PU07), start signals (STF, STR signals) via external terminals, and the forward and
reverse rotation commands through communication.
4.22.4 Display of applied parameters and user group function (Pr. 160, Pr. 172 to Pr. 174)
(1) Display of simple mode parameters and extended parameters (Pr. 160)
⋅ When Pr. 160 = "9999", only the simple mode parameters can be displayed on the operation panel (FR-DU07) and
parameter unit (FR-PU04/FR-PU07). (Refer to the parameter list, pages 71 to 84, for the simple mode parameters.)
⋅ With the initial value (Pr. 160 = "0"), simple mode parameters and extended parameters can be displayed.
This function can prevent reverse rotation fault resulting from the incorrect input of the start signal.
Parameter
Number
Name Initial Value Setting Range Description
78
Reverse rotation prevention
selection
0
0
Both forward and reverse rotations
enabled
1 Reverse rotation disabled
2 Forward rotation disabled
Parameter which can be read from the operation panel and parameter unit can be restricted.
Parameter
Number
Name Initial Value Setting Range Description
160 *1 User group read selection 0
9999
Only the simple mode parameters can
be displayed.
0
The simple mode and extended
parameters can be displayed
1
Only parameters registered in the user
group can be displayed.
172
User group registered
display/batch clear
0
(0 to 16)
Displays the number of cases registered
as a user group. (Reading only)
9999 Batch clear the user group registration
173
*2 User group registration 9999 0 to 999, 9999
Set the parameter numbers to be
registered to the user group.
174
*2 User group clear 9999 0 to 999, 9999
Set the parameter numbers to be cleared
from the user group.
*1 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.
*2 The values read from Pr. 173 and Pr. 174 are always "9999".
REMARKS
⋅ When a plug-in option is fitted to the inverter, the option parameters can also be read.
⋅ When reading the parameters using the communication option, all parameters can be read regardless of the Pr. 160 setting.
⋅ Pr. 15 Jog frequency, Pr. 16 Jog acceleration/deceleration time Pr. 991 PU contrast adjustment are displayed as simple mode
parameters when the parameter unit (FR-PU04/FR-PU07) is mounted.
⋅ When reading the parameters using the RS-485
terminals, all parameters can be read regardless of the
Pr. 160 setting by setting Pr.550 NET mode operation
command source selection and Pr. 551 PU mode operation
command source selection.
* OP indicates a communication option
Pr. 551 Pr. 550 Pr. 160 Valid/Invalid
1 (RS-485) ⎯ Valid
2 (PU)
(initial value)
3 (USB)
0 (OP) Valid
1 (RS-485) Invalid (all readable)
9999
(auto-detect)
(initial value)
With OP: valid
Without OP: invalid
(all readable)