Reverse Rotation Prevention Selection (Pr. 78 ); Operation Mode Selection (Pr. 79) - Mitsubishi Electric FR-V560 Instruction Manual

4.11.7 Reverse rotation prevention selection (Pr. 78
This function can prevent any reverse rotation fault resulting from the mis-input of the start signal.
POINT
Used for a machine that runs only in one direction, e.g. fan, pump.
(The setting of this parameter is valid for combined operation, PU operation, external operation and
communication operation.)
Parameter Name
Reverse rotation prevention
78
selection
<Setting>
Control
Pr. 78 Setting
Method
0
Speed
1
control
(reverse rotation lock)
V/F control
2
(forward rotation lock)
0
1
(reverse rotation lock)
Torque
control
2
(forward rotation lock)
0
Position
control 1
(reverse rotation lock)
2
(forward rotation lock)
4.11.8 Operation mode selection (Pr. 79
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 external operation mode is selected at power-on (factory setting).
Parameter Name
79 Operation mode selection
Operation selection function 2 (Pr. 65 to Pr. 79)
Factory Setting Setting Range
0
Start Signal
STF STR
Valid Valid
Valid Invalid
Invalid Valid
Valid Valid
Valid Invalid
Invalid Valid
Functions as a stroke signal
and motor does not rotate in
the direction where the STF or
STR signal does not exist.
Motor does not rotate in the
reverse rotation direction.
Motor does not rotate in the
forward rotation direction.
with without
Encoder Encoder
Speed
Factory Setting Setting Range
0
129
with without with
Encoder Encoder Encoder
Torque
Speed
0, 1, 2 Extended mode
Restriction on Analog Reversible
Negative input starts rotation in the direction
opposite to that of start signal
Negative input does not start rotation.
Negative input starts rotation in the direction
opposite to that of start signal
Negative analog input results as follows.
Speed
Start speed or less
When rotation is in the
same direction as that of
start signal and speed is
higher than starting speed.
Under position control, analog command is
irrelevant to the forward/reverse rotation lock
function as it does not function in other than torque
restriction setting (absolute value used for
operation).
with without Condi-
tional PLC
Encoder Encoder
Torque Position
0 to 4, 6 to 8
without Condi-
tional PLC SSC
Encoder
)
Position
Remarks
Operation
No rotation
Torque in the
direction opposite to
that of start signal is
generated.
SSC
)
4