Control Techniques Epsilon EP-P, Reference Manual

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Epsilon EP-P Drive Reference Manual
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www.controltechniques.com Revision: A4
Power Module
This fault is generated when a power stage over-temperature, over-current or loss of power stage logic supply occurs. This can be the result of
a motor short to ground, a short in the motor windings, a motor cable short or the failure of a switching transistor.
High DC Bus
This fault will occur whenever the voltage on the DC bus exceeds the High DC Bus threshold. The most likely cause of this fault would be an
open external shunt, a high AC line condition, or an application that requires an external shunt (e.g., a large load with rapid deceleration) but
none is installed.
Low DC Bus
This fault will occur whenever the voltage on the DC bus drops below the Low DC Bus threshold. The most likely cause of this fault is a
reduction (or loss) of AC power. A 50 ms debounce time is used with this fault to avoid faults caused by intermittent power disruption. With an
Epsilon EP drive, the low DC bus monitoring can be disabled. In an EP-B and EP-I this fault is disabled by clearing the check box on the Faults
view, and for an EP-P the check box is located on the Advanced view
Special note for EP209 and EP216 drives, the Low DC Bus fault may not be disabled. The bus voltage must reach 140 Vdc (100 Vac input)
before this fault will reset and it will reset automatically. It will occur again when the bus voltage drops by 50 V from the voltage on the bus
when soft-start mode ends and the drive is ready to run.
Encoder State
Certain encoder state transitions are invalid and will cause the drive to report an encoder state fault. This is usually the result of noisy encoder
feedback caused by poor shielding. For some types of custom motors it may be necessary to disable this fault. With an Epsilon EP-P drive, the
Encoder State monitoring can be disabled by clearing the check box on the Advanced view.
Encoder Hardware
If any pair of complementary encoder lines (A, B, Z) are in the same state, an encoder line fault is generated. Also, can be generated if all three
commutation channels (U, V, W) are 0 or 1, an illegal state. The most likely cause is a missing or bad encoder connection.
Motor Overtemp
This fault is generated when the motor thermal switch is open due to motor over-temperature or incorrect wiring.
RMS Shunt Power
This fault is generated when RMS shunt power dissipation is greater than the design rating of the internal shunt.
Overspeed
This fault occurs in one of two circumstances:
1. When the actual motor speed exceeds the Overspeed Velocity Limit parameter or 150% of motor maximum operating speed.
This parameter can be accessed with PowerTools Pro software.
2. If the combination of command pulse frequency and Pulse Ratio can generate a motor command speed in excess of the fixed
limit of 13000 RPM, an Overspeed Fault will be activated. In Pulse mode operation and any Summation mode which uses Pulse
mode, the input pulse command frequency is monitored and this calculation is made. For example, with a Pulse Ratio of 10
pulses per motor revolution, the first pulse received will cause an Overspeed fault even before there is any motor motion.
Drive Over Temp
3. Indicates the drive internal temperature has reached an over temperature condition - not currently implemented in the EP202,
EP204 or EP206 models. For Epsilon EP209 and EP216 drive models, this fault will occur if the soft-start circuit has failed or
mis-wiring of the bus or shunt prevents proper start-up, resulting in overheating the soft-start resistor internal to the drive. With
the EP216 model this over temperature condition could be the result of fan failure.
Following Error
This fault is generated when the following error exceeds the following error limit. With PowerTools Pro you can change the Following Error
Limit value, enable or disable it in the Position view.
High DC Bus Threshold
Epsilon EP 415 Vdc
Low DC Bus Threshold
Epsilon EP 60 Vdc