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Diagnostics and Troubleshooting
FM-3 Specific Fault Descriptions
Figure 5: FM-3 display is used to display drive and FM-3 faults
Traj Fault
This fault occurs when the drive has received trajectory data from the FM-3 that indicates a
problem. Check the user units, velocities, accels and decels for correct values.
ISR Overrun
This fault is generated when a module flash memory problem occurs. To correct, replace the
FM-3.
OutofSync
This fault is generated when the system is out of sync. To correct it, press the reset button and
check the configuration.
ProgramFault
This fault indicates an FM-3 user program fault. For example the program is attempting to
divide by zero, or overflows and math errors caused by numbers that are too large, or non-
existing parameters.
ProgramInvalid
The user program in flash memory will not run. Download the User Program again using
PowerTools FM-3. A common cause of this problem could be an interrupted configuration
download, such as a cable being disconnected during a download.
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