Reverse Rotation Prevention Selection (Pr. 78) - Mitsubishi Electric FR-E540-0.4K-EC Instruction Manual

<Setting>
Pr. 77
Setting
Parameter values may only be written during a stop in the
0
PU operation mode. (Note 1)
Write disabled.
1 Values of Pr. 75, Pr. 77 and Pr. 79 "operation mode
selection" may be written.
2 Write enabled even during operation.
Note: 1. The parameters half-tone screened in the parameter list can be set at any
time.
2. If Pr. 77 = "2", the values of Pr. 23, Pr. 66, Pr. 71, Pr. 79, Pr. 90, Pr. 96,
Pr. 180 to Pr. 183 and Pr. 190 to Pr. 192 cannot be written during operation.
Stop operation when changing their parameter settings.
3. By setting "1" in Pr. 77, the following clear operations can be inhibited:
y Parameter clear
y All clear

4.2.32 Reverse rotation prevention selection (Pr. 78)

Pr. 78 "reverse rotation prevention
selection"
This function can prevent any reverse rotation fault resulting from the incorrect input of
the start signal.
y Used for a machine which runs only in one direction, e.g. fan, pump.
(The setting of this function is valid for the combined, PU, external and
communication operations.)
Parameter
Number
78
<Setting>
Pr. 78 Setting
Both forward and reverse
0
rotations allowed
1 Reverse rotation disallowed
2 Forward rotation disallowed
Function
Factory
Setting Range
Setting
0 0, 1, 2
Function
Related parameters
Pr. 79 "operation m ode selection"
105
PARAMETERS