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Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
Chapter 7
Configure Parameters
F.002 Rated Current
This parameter sets the rated
input current of the 8720MC-
RPS unit. In case of multiple
units connected in parallel, the
total current of the connected
units must be set.
For most applications, we
recommend that this parameter
not be adjusted.
IMPORTANT:
This parameter is
available from software version
3.00 or later (to be shown on
the parameter F.018).
Parameter Range
10…0 A, 37 kW unit (single 37 kW unit)
20…140 A, 75 kW unit (2 paralleled 37 kW units)
30…210 A, 110 kW unit (3 paralleled 37 kW units)
30…215 A, 125 kW unit (single 125 kW unit)
60…430 A, 250 kW unit (2 paralleled 125 kW units)
90…645 A, 375 kW unit (3 paralleled 125 kW units)
Default Setting
65 A, 37 kW unit (single 37 kW unit)
130 A, 75 kW unit (2 paralleled 37 kW units)
195 A, 110 kW unit (3 paralleled 37 kW units)
190 A, 125 kW unit (single 125 kW unit)
380 A, 250 kW unit (2 paralleled 125 kW units)
570 A, 375 kW unit (3 paralleled 125 kW units)
Parameter Type
Requiring the password, configurable only while the unit stops.
Refer also to Parameters
U.001
FWD Current Limit
U.002
REV Current Limit
F.001
Unit Selection
This parameter sets the rated input current in units of amperes. The set value affects the FWD and REV Current Limits (U.001 and U.002),
overload detection, for example.
For paralleled units, the total current value of the connected units must be set to this parameter. When pressing
or
, the displayed value
changes 1 Amp per stroke in case of single unit, 2 Amps per stroke in case of two paralleled units, and 3 Amps per stroke in case of three
paralleled units.
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.
F.003 Current Control Proportional Gain
This parameter determines the
response of the current control.
For most applications, we
recommend that this parameter
not be adjusted.
Parameter Range
0.01…10.00 times
Default Setting
1.00 times
Parameter Type
Requiring the password, configurable only when the unit is normal.
Refer also to Parameters
F.004
Current Control Integral Gain
Larger values of the Current Control Proportional Gain set in this parameter result in faster response of the current control loop. However, if the
gain value is set too large, the unit becomes more susceptible to overcurrent detection and unstable by starting vibration of input current.
Decreasing the gain value helps increase stability, but result in less responsiveness.
F.004 Current Control Integral Gain
This parameter determines the
dynamic characteristics of the
current control.
For most applications, we
recommend that this parameter
not be adjusted.
Parameter Range
1…3,000 rad/s
Default Setting
64 rad/s
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 helps increase stability, but the arrival time to the reference
current value becomes longer to a change of input current.