Emerson FM-3 Manuel D’Utilisation

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FM-3 Programming Module Reference Manual

A number of diagnostic and fault detection circuits are incorporated to protect the drive. Some 
faults, such as 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.

Indexing

Index is executing.

Drive Type         Address
Motor Type
Menu Groups

Decelerating from Stop

Deceleration ramp after the Stop function is 
activated. The ramp is displayed while 
decelerating, and the display will go back to 
normal after completing the decel ramp.

Drive Type         Address
Motor Type
Menu Groups

Jogging

Jog is executing.

Drive Type         Address
Motor Type
Menu Groups

Program

Program is executing.

Drive Type         Address
Motor Type
Menu Groups

Flash Invalid

Reprogram the FM’s 

Flash

Yes

Watchdog Timer

Reset Button or Input 

Line

Yes

Watch Dog