Omron MX2 Series User Manual

7 Other Functions
7 - 94
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
7-9 DC Injection Braking Function
This section describes the DC injection braking function.
7-9-1 DC Injection Braking (DB)
Use this function to have the motor apply DC injection braking according to the load.
For an induction motor, this function allows braking with no feedback of regenerated energy to the
inverter.
However, for a PM motor, consider to take measures against overvoltage because even the DC injec-
tion braking function allows regenerated energy to be fed back to the inverter.
DC injection braking can be controlled with one of the following three methods:
• Setting the Multi-function Input 1 to 7 Selection (C001 to C007) to 07 (DB: External DC injec-
tion braking) and turning ON/OFF the terminal to which the external DC injection braking function
is allocated.
• Setting the DC Injection Braking Selection (A051) to 01 (Enabled) and then setting appropriate
function parameters.
• Setting the DC Injection Braking Selection (A051) to 02 (Enabled) and controlling the motor only
by comparison via the frequency set in the DC Injection Braking Frequency parameter.
Note, however that the use of DC injection braking may not cause the motor to stop due to the moment
of inertia of the motor load.
Parameter
No.
Function name
Data
Default
data
Unit
A051
DC Injection Braking Selection
00: Disabled
01: Enabled
02: Enabled
(Operates only via set frequency)
00
−
A052
DC Injection Braking Frequency
0.00 to 60.00
Set the frequency at which you want to
start DC injection braking to stop the
motor rotation, when the DC injection
braking function is enabled.
0.50
Hz
A053
DC Injection Braking Delay
Time
0.0 to 5.0
Set the delay time until the motor starts
applying DC injection braking after the set
DC Injection Braking Frequency is
reached, or after the terminal DB turns ON.
0.0
s
A054
DC Injection Braking Power
Heavy load mode (b049 = 00): 0. to
100.
Light load mode (b049 = 01): 0. to 70.
0. (Weakest: Zero current) to 100.
(Strongest: Rated current)
50.
%
A057
Startup DC Injection Braking
Power
0.
%
A055
DC Injection Braking Time
0.0 to 60.0
Set the time during which DC injection
braking is applied after deceleration stop.
Setting this time is effective when the
terminal DB performs edge operation.
0.5
s
A056
DC Injection Braking Edge/Level
Selection
00: Edge operation (Examples 1 − a to 6 − a)
01: Level operation (Examples 1 − b to 6 − b)
01
−
7
7-9 DC Injection Braking Function
7-9-1 DC Injection Braking (DB)

Omron MX2 Series Specifications

General

Brand	Omron
Model	MX2 Series
Category	Inverter
Language	English