Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
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Configure Parameters
Chapter 7
F.005 Voltage Control Proportional Gain
This parameter determines the
response of the voltage control.
Parameter Range
0.01…30.00 times
Default Setting
5 times
Parameter Type
Requiring the password, configurable only when the unit is normal.
Refer also to Parameters
F.006
Voltage Control Integral Gain
Larger values of the Voltage Control Proportional Gain set in this parameter result in faster response to change of DC-bus voltage. But, If the
gain is set too large, the unit becomes unstable. Decreasing the gain value helps increase stability, but can result in less responsiveness to a
change of DC-bus voltage.
If capacity of load equipment capacitors is large, increase the set value of the Voltage Control Proportional Gain.
F.006 Voltage Control Integral Gain
This parameter determines the
dynamic characteristics of the
voltage control.
For most applications, we
recommend that this parameter
not be adjusted.
Parameter Range
1…3,000 rad/s
Default Setting
128 rad/s
Parameter Type
Requiring the password, configurable only when the unit is normal.
Refer also to Parameters
F.005
Voltage Control Proportional Gain
Larger values of the Voltage Control Integral Gain set in this parameter result in shorter arrival time to the set value. But, if the gain is set too
large, the voltage vibrates and becomes unstable. Decreasing the gain helps increase stability, but the arrival time to the set value becomes
longer to a change of DC bus voltage.
When capacity of load equipment capacitors is large, increase the set value of the Voltage Control Integral Gain.
F.007 Bus Overvoltage Detection Level
This parameter sets the voltage
level to detect the DC-bus
overvoltage error.
Parameter Range
325…900V
Default Setting
800V
Parameter Type
Requiring the password, configurable only while the unit stops.
Refer also to Parameters
U.000
DC-bus Voltage Reference
F.001
Unit Selection
F.008
Bus Low Voltage Detection Level
When the DC-bus voltage reaches the set value of the Bus Overvoltage Detection Level, the DC-bus overvoltage error is detected. When the
error is detected, the PWM switching stops, the discharge operation starts, and operation stops.
When load changes largely due to rapid deceleration of load equipment or other reasons, the DC-bus voltage might be increased
instantaneously. If the voltage difference between the set values of the DC-bus Voltage Reference (U.000) and the Bus Overvoltage Detection
Level is not large enough, the bus overvoltage error might be detected.
Set the Bus Overvoltage Detection Level to the same value as the detection level of the load equipment.
ATTENTION:
Only qualified electrical personnel familiar with the construction and operation of
this equipment and the hazards involved should change the Factory Parameters. Read and
understand this instruction manual in its entirety before proceeding. Failure to change
parameter values could result in destruction of the equipment, severe bodily injury or loss of life.