Hitachi SJ Series, User Manual

Page: 344 / 786

12-15-3
Chapter 12 Inverter Function
DC braking force for stopping
• To use the DC braking force for stopping, set
[AF101] DC braking selection to 01, [AF102]
Braking mode selection to 00, [AF106] DC braking
time to other than 0.00 s, and [AF105] DC braking
force to any any value. When the frequency output
is shut off, DC braking force will be applied.
• The braking force is adjusted at the [AF105] DC
braking force.
• When [AF104] DC braking delay time is set, and if
the operation command is turned off and the
decelerated frequency falls below [AF103] DC
braking frequency, the output will be shut off once,
and after [AF104] has elapsed, DC braking will be
started.
• Edge mode: [AF107]=00
[AF106] DC braking time setting is given priority,
and the inverter performs DC braking for the time
set for [AF106]. After the operation command is
turned off, if the output frequency falls below
[AF103] DC braking frequency, DC braking will be
applied for the time set for [AF106]. Even if the
operation command is turned on during DC
braking, DC braking continues until the time set
for [AF106] elapses. (Ex. 1), (Ex. 2)
• The operation to be performed when the operation
command is switched from the stop command to
the start command varies depending on the
setting of [AF107] DC braking/edge or level
selection.
• When setting [AF105] DC braking force and
[AF106] DC braking time, pay attention to the heat
generation on the motor.
• Level mode: [AF107]=01
Operation commands are given priority. The
inverter ignores [AF106] DC braking time and
transits to the normal operation. If the start
command is turned on during DC braking, the
inverter ignores the time set for [AF106] and
returns to the normal operation. (Ex. 3), (Ex. 4)
Edge mode: [AF107]=00 Level mode: [AF107]=01
(Ex. 1) When stopped ([AF104] ≠ 0.00)
Operation command [FW]
Output frequency
(Ex. 3) When stopped ([AF104] ≠ 0.00)
Operation command [FW]
Output frequency
(Ex. 2) When stopped ([AF104]=0.00)
Operation command [FW]
Output frequency
(Ex. 4) When stopped ([AF104]=0.00)
Operation command [FW]
Output frequency
A
！
[AF104]
Free-running
[AF106]
[AF103]
DC braking
ON
ON
[AF103]
DC braking
[AF104]
[AF106]
Free-running
ON
ON
[AF103]
[AF106]
DC braking
ON ON
[AF103]
[AF106]
DC braking
ON
ON