Dc Injection Braking Function; Dc Injection Braking (Db) - Omron M1 Series User Manual

8-5

DC Injection Braking Function

This section describes the DC injection braking function.
8-5-1

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 in-
verter. However, for a PM motor, consider to take measures against overvoltage because even the DC
injection 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 "13: DB (External DC injection braking)" to Input Terminal [DI1] to [DI7] Function Selection
(3005Hex-02Hex to 3005Hex-06Hex, 3005Hex-63Hex, 3005Hex-64Hex), and turning ON/OFF the
terminal to which the external DC injection braking function is allocated.
• Setting DC Injection Braking Selection (301FHex-0FHex) and then setting appropriate function pa-
rameters.
• Setting DC Injection Braking Selection (301FHex-0FHex) and controlling the motor only by compari-
son 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 mo-
ment of inertia of the motor load.
DC injection braking is disabled when the torque control, position control and servo lock is enabled.
Parameter No.
301FHex-0FHex
3004Hex-15Hex/
3009Hex-0AHex
3004Hex-16Hex/
3009Hex-0BHex
3004Hex-17Hex/
3009Hex-0CHex
3008Hex-60Hex
301FHex-10Hex
3020Hex-60Hex
M1 Series EtherCAT Type User's Manual (I670)
Function name
DC Injection Braking Selection
1st DC Injection Braking Start
Frequency/2nd DC Injection
Braking Start Frequency
1st DC Injection Braking
Level/2nd DC Injection Braking
Level
1st DC Injection Braking
Time/2nd DC Injection Braking
Time
DC Injection Braking Start Char-
acteristic Selection
External DC Injection Braking
Edge/Level Selection
DC Injection Braking Startup
Time
Data
0: External DC injection
braking
1: External DC injection
braking/setting frequency
2: Setting frequency
0.0 to 60.0
0 to 100 (HHD mode)
0 to 80 (HND/HD mode)
0 to 60 (ND mode)
Based on inverter rated
current
0.00: Disable
0.01 to 30.00
0: Slow response
1: Quick response
0: Edge operation
1: Level operation
0.00: Disable
0.01 to 30.00
Only motor 1 is effective
8 Other Functions
Default da-
Unit
ta
0 -
0.0 Hz
0 %
0.00 s
1 -
1 -
0 s
8-55
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