Hitachi WJ C1 Series User Manual

Chapter 9 Inverter Functions
9-7-13
DC braking when stopping ([A051] = "Enable (01)")
 DC braking can be applied when the inverter is stopped without the use of the [DB] terminal.
 To perform DC braking when stopping, set the "DC braking selection [A051]" to "Enable (01)",
and then set the "DC braking frequency [A052]".
 DC braking operation will vary depending on the edge operation/level operation settings in the
"DC braking operation method selection [A056]". If the "DC braking delay time [A053]" is set to a
value other than 0.0, free run stop (output shutdown) is performed before DC braking is applied.
Configure edge operation or level operation settings to match the system in use, referring to the
operation examples provided in the figure below. When edge operation is selected, set the "DC
braking active time at stop [A055]".
 When the "DC braking selection [A051]" is set to "Enable (01)", DC braking can be triggered at
start when the RUN command is turned on. For details, also refer to "9.7.2 Starting with DC
Braking".
* In the case of edge operation, DC braking is applied for the duration of the [A055] setting when the output frequency falls below [A052].
In the case of level operation, DC braking is applied until the RUN command turns on when the output frequency falls below [A052].
[A055]
ON
RUN
command
Output
frequency
DC braking
frequency [A052]
* If a value other than 0.0 (s) is set as the "DC braking delay time [A053]", DC braking is applied after free run stop (output shutdown) for
the allotted time.
ON
RUN
command
Output
frequency
DC braking
frequency [A052]
(Example 5-a) [A056] = "Edge operation (00)"
(Example 5-b) [A056] = "Level operation (00)"
◼ (Example 5) When the "DC braking delay time [A053]" is set to a value other than 0.0 (s),
and the same operation as that described in (Example 4) above is performed.
◼ (Example 4) Turning the RUN command on and off. The [A053] setting is 0.0 (s).
(Example 4-b) [A056] = "Level operation (01)"
(Example 4-a) [A056] = "Edge operation (00)"
[A055]
ON
RUN
command
Output
frequency
[A053]
DC braking
frequency [A052]
DC braking
Free running
ON
RUN
command
Output
frequency
[A053]
DC braking
frequency [A052]
DC braking
Free running
DC braking
DC braking
A
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Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English