Instruction manual

111
4
PARAMETERS
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.
• 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.)
<Setting>
4.2.33 Operation mode selection (Pr. 79)
Pr. 79 "operation mode selection"
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).
When power is switched on (factory setting), the
external operation mode is selected.
Parameter
Number
Factory
Setting
Setting
Range
78 0 0, 1, 2
Pr. 78 Setting Function
0 Both forward and reverse rotations allowed
1 Reverse rotation disallowed
2 Forward rotation disallowed
Parameter
Number
Factory
Setting
Setting
Range
79 0 0 to 4, 6 to 8
Pr. 79 "operation mode selection"
Related parameters
Pr. 4 to Pr. 6, Pr. 24 to Pr. 27,
Pr. 232 to Pr. 239
(multi-speed operation)
Pr. 75 "reset selection/disconnected
PU detection/PU stop selection"
Pr. 180 to Pr. 183
(input terminal function selection)
Related parameters
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