Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 100)

F.004 Current Control Integral Gain
This parameter determines
the dynamic characteristics
of the current control.
For most applications, it is
recommended that this
parameter not be adjusted.
Parameter Range: 1 to 3,000 rad/sec
Default Setting: 64 rad/sec
Parameter Type: Requiring the password, configurable only when the unit is normal
Refer also to Parameters: F.003 Current Control Proportional Gain
Larger values of the Current Control Integral Gain set in this parameter result in shorter arrival time to the
reference current value. If the gain is set too large, the current vibrates and becomes unstable.
Decreasing the gain will help increase stability, but the arrival time to the reference current value becomes
longer to a change of input current.
7-8 Parameters
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 will help increase stability, but may result in less respondence 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.005 Voltage Control Proportional Gain
This parameter determines
the response of the voltage
control. Parameter Range: 0.01 to 30.00 times
Default Setting: 5.00 times
Parameter Type: Requiring the password, configurable only when the unit is normal
Refer also to Parameters: F.006 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 to 900 V
Default Setting: 800 V
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 will be detected. When the error is detected, the PWM switching will stop, the discharge
operation will start, and operation will stop.
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.
F.006 Voltage Control Integral Gain
This parameter determines
the dynamic characteristics
of the voltage control.
For most applications, it is
recommended that this
parameter not be adjusted.
Parameter Range: 1 to 3,000 rad/sec
Default Setting: 128 rad/sec
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 will
help 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.