MITSUBISHI ELECTRIC FR-S520E - Manual (Page 123)

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Operation selection function parameters
2
F
UNCT
IO
NS
2.10.8 Reverse rotation prevention selection (Pr. 78 )
<Setting>
2.10.9 Operation mode selection (Pr. 79 )
This function can prevent reverse rotation faults resulting from the incorrect
input of the start signal.
POINT
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 Name
Factory
Setting
Setting
Range
Remarks
78
Reverse rotation
prevention selection
0 0, 1, 2 Setting is enabled when Pr. 30 = "1"
Pr. 78 Setting Function
0 Both forward and reverse rotations allowed
1 Reverse rotation disallowed
2 Forward rotation disallowed
Used to select the operation mode of the inverter.
The inverter can be run from the operation panel or parameter unit (PU
operation), with external signals (external operation), or by combination of PU
operation and external operation (external/PU combined operation).
The inverter is placed in the external operation mode at power on (factory
setting).
Parameter Name Factory Setting Setting Range
79 Operation mode selection 0 0 to 4, 7, 8