EN Series Drives Manual
Encoder Line Fault
If any pair of encoder lines are in the same state, an encoder line fault is
generated. The most likely cause is a missing or bad encoder connection.
Motor Over Temperature Fault
This fault is generated when the motor thermal switch is open due to motor
over-temperature or mis-wiring.
RMS Shunt Power Fault
This fault is generated when RMS shunt power dissipation is greater than the
design rating of the internal shunt in the drives that have an internal shunt
(EN-208 and EN-214). On the EN-204 drives, this indicates that the
application requires an external shunt.
Over Speed Fault
This fault occurs in any of three circumstances:
• When the actual motor speed exceeds 150% of the maximum motor
speed as shown in the motor/drive specification table. This maximum
overspeed value is not dependent on the applied AC voltage parameter.
• When the actual motor speed exceeds the user entered overspeed limit
parameter. This parameter can be changed with the PowerTools
software.
• In pulse mode operation, when the frequency input actually received
generates a motor command speed in excess of 13000 RPM. The input
frequency that will cause this is dependent on the command pulse per
motor revolution setting. For example: With a pulse command ratio of
10 pulses per motor revolution. the first pulse received will cause this
overspeed fault to occur.
Following Error Fault
This fault is generated when the following error exceeds the following error
limit (default following error limit is .2 revs). This is typically used in pulse
follower mode.
CW/CCW Limit
This fault is caused when either the CW or CCW Limit input function is active.
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