Hitachi SJ Series, User Manual

Page: 197 / 786

12-6-2
Chapter 12 Inverter Functions
12.6.2 Limit operation command direction.
• Want to limit the operation command direction.
• Want to prevent damage of the machine due to the
inverter output in opposite direction.
• Output in the allowed rotation direction can be
obtained by setting the operation direction limit
selection [AA114] to limit the direction of the
operation.
• Set the operation direction limit selection if reverse
operation output could adversely affect connected
machines with no external force applied.
Parameters
• Even if this function works, you may have output
of reverse operation as a result of the control other
than V/f control. In this case, enable the reverse
operation prevention function.
See “12.6.3 Limiting output direction.”
• 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.
• The reverse rotation direction command due to a
negative value of the frequency is also restricted.
• Output stops when the direction is being limited.
Item Parameters Data Description
Operation direction limit
selection
[AA114]
00 Both forward and reverse
rotations enabled
01 Only forward rotation enabled
02 Only reverse rotation enabled
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