Reverse Rotation Prevention Selection (Pr. 78) - Mitsubishi Electric FR-E500 Instruction Manual

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 Parameter 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
Factory Setting
Setting Range
0 0, 1, 2
Function
Related parameters
Pr. 79 "operation m ode selection"
108
PARAMETERS