Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 69)

Publication 8720MC-IN002A-EN-P — December 2002
Troubleshooting Your 8720MC Servo Drive 3-15
Troubleshooting the
8720MC-RPS Regenerative
Power Supply The 8720MC-RPS regenerative power supply is equipped with a 4
character display, 6 LEDs and 5 function keys. The display can be
used to monitor incoming AC voltage, outgoing DC bus voltage, input
current to the RPS, output power in kW and % RPS load. In addition
the display can be used to view the RPS error log which can contain
up to 10 error messages in the form of fault codes. The error messages
are displayed as a 2 or 3 character flashing display. The last error that
occurred is the first one to appear on the screen when accessing the
error log. If multiple errors occur at the same time the corresponding
error codes are scrolled, flashing one by one. To reset an error code,
press the reset, “RST”, key or recycle power after removing the cause
of the error.
The 8720MC Regenerative Power Supply User Manual (publication
8720MC-RM001x-US-P) contains a complete listing of all the fault
codes along with appropriate corrective measures. It also provides
troubleshooting procedures as well as a troubleshooting flowchart.
The 8720MC High Performance Drives Installation Manual
(publication 8720MC-IN001x-EN-P) shows how to wire the various
configurations between the drive and RPS. In general, it is
recommended that the run output is connected in series with Input 1,
“Drive Enable”, on P5-14. It is required to tie the RPS fault output to
input 10 on the drive, P5-36, “Regen PS OK”. Parameter 617 “Regen PS
Fault” can be monitored on the HIM or DriveExplorer
to determine
the state of the RPS. This parameter can also be linked to a digital
output if the application requires it.