Hitachi WJ C1 Series User Manual

Chapter 9 Inverter Functions
9-4-2
9.4.2 Limiting RUN Command Direction
 How to apply a limit to the RUN command direction?
 How to prevent equipment from being damaged if the inverter outputs in the reverse direction?
 By setting the "RUN direction restriction selection [b035]" parameter, it is possible to limit the
RUN command direction to either forward or reverse rotation.
 This function can also limit reverse rotation commands that are triggered by the frequency
command sign changing to negative.
 When the operation direction limit function is activated, output to the motor is stopped, and
is displayed on the inverter display.
 This function works by limiting RUN command direction. Therefore, it is not effective in cases
such as when using control methods other than V/f control where control calculations can result
in an output that causes reverse operation. To limit the output, enable "Direction reversal
protection selection [b046]". For details, refer to "9.4.3 Limiting Rotation Output Direction".
 Even when this function is used, the motor may rotate in the reverse direction when subject to
external forces. When using this function as a protection against reverse rotation, the system
must be free of external forces that are applied in the reverse direction.
Code
Item
Description
Data
[b035]
RUN direction
restriction selection
No restriction
00
Only forward rotation commands are enabled.
(Reverse rotation is limited.)
01
Only reverse rotation commands are enabled.
(Forward rotation is limited.)
02

Q
A
!

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English