External Dc Injection Braking - Omron RX Series User Manual

• If the reference frequency is 0 during startup via analog input etc., the inverter starts operating with
DC injection braking. (Example 7-b)
If the RUN command turns ON when the frequency reference is higher than the DC Injection Braking
Frequency (A052), the inverter starts operating with normal output. (Example 7-a)
RUN
command
A052
Frequency
reference
Output
frequency
• The inverter behaves differently when returning to normal operation depending on the value set in the
DC Injection Braking Edge/Level Selection (A056).
(a) Edge operation (A056= 00)
RUN
command
A052
Frequency
reference
Output
frequency

External DC Injection Braking

• Allocate one of the Multi-function Input S1 to S8 Selection (C001 to C008) to 07 (DB: External DC
injection braking).
• DC injection braking is applied by turning ON/OFF the DB terminal, independent of the DC Injection
Braking Selection (A051).
• In the DC Injection Braking Power (A054), set the strength or weakness of the DC injection braking
power.
• When the DC Injection Braking Delay Time (A053) is set, the inverter shuts off its output and remains
in a free-run state during the set time. After the expiration of the set time, the inverter starts DC
injection braking.
• Set the DC injection time via the DC Injection Braking Time (A055) or the DB terminal, while taking
into account the heat generation of the motor.
• Select the operation in the DC Injection Braking Edge/Level Selection (A056) and configure the
required settings according to your system.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
(Example 7-a)
ON
ON
A055
7 Detailed Functions
(Example 7-b)
ON
RUN
command
A052
Frequency
reference
Output
frequency
(b) Level operation (A056= 01)
ON
FW input
A052
Frequency
reference
Output
frequency
7
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