Technical information

147
Troubleshooting
different application module for the first time. It may be cleared with the reset push-button on
the front panel just to the right of the LED display. If this fault cannot be cleared with the reset
push-button, contact factory service.
(L) Travel Limit
The “L” fault occurs when either a hardware travel limit or a software travel limit is exceeded.
Motion in the direction opposite to the one that caused the fault (away from the exceeded
limit) is allowed. You must clear the fault to allow further motion in that direction. The fault
is cleared by I/O, the reset push button, serial commands or moving the motor out of the
position that triggered the fault.
(F) Position Error Fault
This fault occurs when the motor is out of position by more than the pre-programmed
“Maximum Following Error” from the Limits screen in PCX. Other reasons for this fault is
the motor trying to exceed its peak torque capability or trying to go too fast with a low voltage
AC line.
(Ø) Watch Dog Timer Fault
This indicates that the internal microprocessor was reset. If this occurs, a “Ø” is indicated on
the diagnostics display.
(1) RMS Current Fault
The drive monitors peak demands for current required to move the load. When the average
current demand is greater than the continuous current rating of the drive for more than 1.5 to
5 seconds, the drive will shut down and display a “1” fault.
Excess loading can be caused by high friction, large inertia, short cycle times, or a
combination of all of these.
If “1” faults occur, check the application to determine what is causing excess loading and
CORRECT it before resetting the drive.
Repeated resetting of “1” faults may cause a drive failure. Power down and fix the
application instead of running the drive.
Percent of Continuous Current Approximate Time Before “1” Fault (seconds)
100 Continuous NO FAULT
120 5.0
140 3.0