Hitachi SJ Series, User Manual

Page: 345 / 786

12-15-4
Chapter 12 Inverter Function
DC braking with frequency command
• To use the DC braking with frequency command,
set [AF101] DC braking selection to 02, and
[AF106] DC braking time to other than 0.0 s. DC
output can be started by changing the frequency
command.
• The inverter starts DC braking when both the
frequency set by the frequency command and the
output frequency fall to [AF103] or below. (Ex. 5)
• This function operates only when the operation
command is on.
• How the inverter returns to the normal operation
varies depending on the setting of the DC
braking/edge or level selection [AF107].
• When "00" is specified for [AF107], the inverter
returns to the normal operation after [AF106] DC
braking time has elapsed. (Ex. 7)
• If the function of the DC braking with frequency
command is enabled, [DB] (input terminal 030) will
be disabled.
• If the function of the DC braking with frequency
command is enabled, the setting of [AF102] will be
disabled and DC braking with [AF102]=00 will
operate.
• If the operation command is turned on after the
frequency command has been established (where
a value larger than [AF103]+2 Hz is input), the
inverter will start operation with the normal output.
• If the frequency command at starting is "0" when
the operation command is given via an analog
input terminal, the inverter will start operation with
DC braking because both the frequency set by the
frequency command and current output frequency
are "0". (Ex. 6)
• When [AF107]=01: The inverter starts
acceleration when the frequency command
exceeds [AF103]+2 Hz. (Ex. 8)
Edge mode: [AF107]=00 Level mode: [AF107]=01
A
!
Operation
command
Frequency
command
Output
frequency
(Ex. 5)
[AF103]
ON
[AF103]
Operation
command [FW]
Frequency
command
Output
frequency
[AF103]
ON
AF106
[AF103]
(Ex. 7)
Operation
command FW
Frequency
command
Output
frequency
[AF103]
ON
[AF103]
(Ex. 8)
Output
frequency
Frequency
command
Operation
command
(Ex. 6)
ON
[AF103]
[AF103]