Rockwell Automation Publication 750-PM001N-EN-P - February 2017 91
Drive Port 0 Parameters Chapter 3
DRIVE CFG
Braking Features
376 Bus Limit Kp
Bus Limit Proportional Gain
Not functional when any of the FV motor control modes are selected.
Units:
Default:
Min/Max:
A/V
1170.0
0.0 / 1000000.0
RW Real
377 Bus Limit Kd
Bus Limit Derivative Gain
Not functional when any of the FV motor control modes are selected.
Units:
Default:
Min/Max:
Secs
152.0
0.0 / 1000000.0
RW Real
378 Bus Limit ACR Ki
Bus Limit Active Current Regulator Integral Gain
Not functional when any of the FV motor control modes are selected.
Default:
Min/Max:
2045.0
0.0 / 50000.0
RW Real
379 Bus Limit ACR Kp
Bus Limit Active Current Regulator Proportional Gain
Not functional when any of the FV motor control modes are selected.
Units:
Default:
Min/Max:
Hz/A
524.0
0.0 / 100000.0
RW Real
380 Bus Reg Ki
Bus Regulator Integral Gain
Integral gain for the bus voltage regulator. Sets the responsiveness of the bus voltage
regulator.
Default:
Min/Max:
100.000
0.000 / 65535.000
RW Real
381 Bus Reg Kp
Bus Regulator Proportional Gain
Proportional gain for the bus voltage regulator. Sets the responsiveness of the bus
voltage regulator.
Default:
Min/Max:
10.000
0.000 / 65535.000
RW Real
382 DB Resistor Type
Dynamic Brake Resistor Type
Selects whether the internal or external DB protection will be used.
Important: Only one DB resistor can be connected to Frame 2 drives. If an external
dynamic brake is used with a Frame 2 drive, the internal dynamic brake resistor must be
disconnected. Connecting both an internal and external resistor is likely to cause drive
damage. If a dynamic brake resistor is connected to the drive, P372 [Bus Reg Mode A]
and P373 [Bus Reg Mode B] must be set to either option 2, 3, or 4; otherwise the
dynamic brake will not turn on.
Default:
Options:
0 = “Internal”
0 = “Internal”
1 = “External”
RW 32-bit
Integer
383 DB Ext Ohms
Dynamic Brake External Ohms
Used to calculate the maximum negative torque available from the dynamic brake and is
used for the external resistor dynamic brake protection.
Units:
Default:
Min/Max:
Ohms
Based on Drive Rating
Internal / 10000.00
RW Real
384 DB Ext Watts
Dynamic Brake External Watts
Sets the continuous rated power reference for the external dynamic brake resistor. Only
valid when an external dynamic brake resistor is selected (P382 [DB Resistor Type] = 1
“External”). The DB continuous watts are used in the dynamic brake thermal protection
algorithm.
Important: If customer-supplied protection is to be used in place of the drive’s
calculated resistor thermal protection, set the [DB Ext Watts] to its maximum value.
Units:
Default:
Min/Max:
Watt
100.00
1.00 / 500000.00
RW Real
File
Group
No. Display Name
Full Name
Description
Values
Read-Write
Data Type
ATTENTION : Equipment damage may result if a drive mounted (internal) resistor is installed and this parameter is set to
“External.” Thermal protection for the internal resistor will be disabled, resulting in possible device damage.
ATTENTION : The drive does not offer protection for externally mounted brake resistors. A risk of fire exists if external
braking resistors are not protected. External resistor packages must be self-protected from over-temperature or the
protective circuit shown in Figure 4 on page 356
(or equivalent) must be supplied.
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