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Epsilon EP-I Indexing Drive and FM-2 Indexing Module Reference Manual
Fault Codes
A number of diagnostic and fault detection circuits are incorporated to protect the drive. Some faults, like high DC bus and
amplifier or motor over temperature, can be reset with the Reset button on the front of the drive or the Reset input function.
Other faults, such as encoder faults, can only be reset by cycling power “Off” (wait until the diagnostics display turns “Off”),
then power “On”.
The drive accurately tracks motor position during fault conditions. For example, if there is a “Low DC Bus” fault where the
power stage is disabled, the drive will continue to track the motor’s position provided the logic power is not interrupted.
The +/- Limit faults are automatically cleared when the fault condition is removed. The table below lists all the fault codes
in priority order from highest to lowest. This means that if two faults are active, only the higher priority fault will be displayed.
Stall Foldback
(EN drive only)
Drive output current is limited to 80 percent of drive stall current.
Ready to Run Drive enabled, no Stop input.
Display Fault Action to Reset Bridge Disabled
Flash Invalid Reprogram the Flash Yes
Drive Overtemp
(Epsilon drive only)
Allow Drive to Cool down,
Cycle Power or Cycle
Logic Power
Yes
Power Up Test
Cycle Power or Cycle
Logic Power
Yes
NVM Invalid Reset Button or Input Line Yes
Invalid Configuration Reset Button or Input Line Yes
Power Module
Reset Button or Input Line
Cycle Logic Power (MDS)
Yes
High DC Bus Reset Button or Input Line Yes
Low DC Bus Reset Button or Input Line Yes
Encoder State
Cycle Power or Cycle
Logic Power
Yes
Display Indication Status Description