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6 Basic Parameter Settings
High-function General-purpose Inverter RX2 Series User’s Manual
6-5 Limit Frequency and Operation Commands
6
6-5-2 Limit Operation Command Direction
Output in the allowed rotation direction can be obtained by setting the RUN-direction restriction,
1st-motor [AA114] to limit the direction of the operation.
Set the operation direction limit selection if reverse operation output could adversely affect connected
machines.
The reverse rotation direction command due to a negative value of the frequency is also restricted.
Output stops when the direction is being limited.
Precautions for Correct Use
• Even if this function works, you may have output of reverse operation as a result of the con-
trol other than V/f control. In this case, enable the reverse operation prevention function.
See 6-5-3 Limit Output Direction on page 6-45.
• Even if this function is used, the motor may rotate in the reverse direction under an external
force applied in that direction. If you use this function to limit the operation direction, use the
function for a system that does not receive an external force applied in the reverse direction.
Parameter
Under some control, output at a low speed in the direction opposite to the one specified in the operation
command may occur. The output can be restricted in the direction specified in the operation command
if the reverse rotation prevention function selection [HC114] is used.
Enable the reverse rotation prevention function selection if the reverse rotation of the motor could give
damage to the connected machine.
6-5-2 Limit Operation Command Direction
Item
Parameters
Data Description
Default
data
RUN-direction restric-
tion, 1st-motor
[AA114]
00 Both forward and reverse rotations enabled
0001 Only forward rotation enabled
02 Only reverse rotation enabled
6-5-3 Limit Output Direction
Command input
Frequency command
Upper limiter [dA-14]
Lower limiter [bA103]
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