Rockwell Automation Publication 750-QS100B-EN-P - August 2020 57
Reference Information Appendix A
Line Side Converter Settings
If necessary, configure the following line side converter settings.
LCL Filter Capacitor Resonance Alarms
If you are experiencing LCL filter capacitor alarms, code 14117 'CapHighResonance' and/or, code 14118
'CapOverResonace', it may be necessary to tune the line side converter regulator and/or replace the LCL filter capacitors.
Review practices for sizing and locating transformers, found in the following publications:
• PowerFlex 750-Series Products with TotalFORCE Control Installation Instructions, publication 750-IN100
.
• Drives in Common Bus Configurations with PowerFlex 755TM Bus Supplies Application Techniques,
publication DRIVES-AT005
.
If this event occurs while the line side converter is modulating, then the configuration and tuning of the Line Side
Converter may be causing the resonance.
Consider reducing the bandwidth of current and voltage regulators. When parameter 13:300 [BusDistRej Mode] is set
to 2 'FF Power', refer to parameters 13:55 [Volt Reg BW] and 13:75 [Curr Reg BW].
If this event occurs while the line side converter is not modulating, then equipment that shares the source of AC power
may be causing the resonance. Consider changing the power distribution scheme. Consider installing a form of magnetic
isolation, such as an isolation transformer or line reactor. Also consider using the Energy Pause function, which
disconnects the line side converter from the AC source when not needed. For information about configuring the Energy
Pause feature, see PowerFlex 750-Series Products with TotalFORCE Control Reference Manual, publication
750-RM100
.
High Inertia Loads
This section provides information about configuring a drive that is used in an application with a high inertia load.
Acceleration Time
In applications with high inertia of the load and motor rotating mass, the length of the acceleration time is an important
consideration. A typical application where this consideration applies is a centrifugal fan load. High inertia loads can cause
overload conditions of the motor, overload conditions of the drive, or overcurrent conditions of the drive. These issues
can result in the following:
• A motor overload fault (code 10003)
• A drive overload fault (code 10028)
• A software overcurrent fault (code 10092)
• A hardware overcurrent fault (code 10093)
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