Emerson E300 Series - Page 252

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252 E300 Design Guide
Issue Number: 1
If Low Voltage Braking IGBT Threshold Select (D22) = 0 the normal thresholds are used. If Low Voltage Braking IGBT Threshold Select (D22) = 1
then Low Voltage Braking IGBT Threshold (D21) is used, so that the braking IGBT is on with a minimum on time of 1 ms is the DC Bus Voltage (J65)
is above this level, or off if the DC Bus Voltage (J65) is below this level.
See Low Voltage Braking IGBT Threshold (D21).
Injection Braking Level (D23) defines the level of current used for injection braking as a percentage of Motor Rated Current (B02). It should be noted
that if detection of low speed is required, low speed detection may not be detected if Injection Braking Level (D23) is set to a low level. For detection
of low speed it is recommended that Injection Braking Level (D23) is 50 % or more.
Injection Braking Time (D24) defines the time during which DC current is injected into the motor during stopping with injection stopping modes.
D21 Low Voltage Braking IGBT Threshold
Mode Open Loop, RFC-A, RFC-S
Minimum -VM_DC_VOLTAGE_SET Maximum VM_DC_VOLTAGE_SET
Default 0 Units V
Type 16 Bit User Save Update Rate 4 ms read
Display Format Standard Decimal Places 0
Coding RW, VM
D22 Low Voltage Braking IGBT Threshold Select
Mode Open Loop, RFC-A, RFC-S
Minimum 0 Maximum 1
Default 0 Units
Type 1 Bit Volatile Update Rate 4 ms read
Display Format Standard Decimal Places 0
Coding RW
D23 Injection Braking Level
Mode Open Loop
Minimum 0.0 Maximum 150.0
Default 100.0 Units %
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 1
Coding RW, RA
D24 Injection Braking Time
Mode Open Loop
Minimum 0.0 Maximum 100.0
Default 1.0 Units s
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 1
Coding RW