Hitachi SJ Series, User Manual

Page: 346 / 786

12-15-5
Chapter 12 Inverter Function
External DC braking via terminal function
• Assign 030 [DB] to input terminal functions
[CA-01] to [CA-11].
• When [AF101]=00 or 01, DC braking will be
applied depending on whether the [DB] terminal is
on or off.
• Adjust the braking force by adjusting the [AF105]
DC braking force.
• When you set the [AF104] DC braking delay time,
the inverter output will be shut off within the set
period of delay, and the motor will run freely during
the period. (Ex. 11), (Ex. 14)
• DC braking will be restarted after the set period
has elapsed.
• Select the braking mode by the DC braking/edge
or level selection [AF107], and then make any
other necessary settings suitable for your system.
• When [AF107]=00: After [DB] is turned on, the
inverter performs DC braking for the time set for
[AF106] . (Example 9) to (Example 11)
• When [AF107]=01: The inverter performs DC
braking only when [DB] is on. (Ex. 12) to (Ex. 14)
• When setting [AF105] DC braking force, [AF106]
DC braking time, or the ON time of the [DB]
terminal (input terminal function 030), pay
attention to the heat generation on the motor.
• The setting for the [DB] terminal is given priority
over operation commands. (Ex. 9), (Ex. 12)
• If the [DB] terminal is turned on when the motor
speed is high, an overcurrent error or an
overvoltage error may occur.
• When the [DB] terminal is turned on, DC braking
mode that occurs when "00" is specified for
[AF102] Braking mode selection is performed
regardless of the setting for [AF102].
Edge mode: [AF107]=00 Level mode: [AF107]=01
(Ex. 9)
FW
DB
Output frequency
(Ex. 12)
FW
DB
Output frequency
(Ex. 10)
FW
DB
Output frequency
(Ex. 13)
FW
DB
Output frequency
(Ex. 11)
FW
DB
Output frequency
(Ex. 14)
FW
DB
Output frequency
A
！
[AF106]
DC braking
ON
ON
DC braking
ON
ON
[AF106]
DC braking
ON
ON
DC braking
ON
ON
[AF104]
Free-running
[AF106]
DC braking
ON
ON
DC braking
[AF104]
Free-running
ON
ON