Protective Circuits; Drive Overtemperature Protection; Short Circuit Protection; Regeneration - Parker Compumotor TQ10 User Manual

Mechanical Problems
Encoder Problems
Electrical Noise Problems

Protective Circuits

Drive Overtemperature Protection

Short Circuit Protection

Regeneration

TQ10 User Guide
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Check for binds, jams, increased friction, or other problems in the mechanical system. If a
system was working properly, but then suddenly develops new problems, check for changes
in the mechanical system that could be causing the problems—increased friction, lack of
grease, worn bearings, etc.
Encoders that are miswired or malfunctioning can cause problems during a move. Check
wiring from the encoder to the controller, or to the TQ10SD. To isolate a malfunctioning
encoder, rotate the motor shaft a known distance, and check the encoder readout (the
TQ10SD has no encoder readout). Verify that the encoder is properly coupled to the motor
shaft, especially during rapid acceleration. Some symptoms of encoder problems are no
motion, or motor runaway.
Electrical noise can cause problems, depending on the application and the sensitivity of
equipment in the system. For more information on identifying problems caused by
electrical noise, and solutions to those problems, consult the technical section in
Compumotor's current catalog.
The TQ10 Drive has several protective circuits, some of which can indicate fault conditions
by illuminating one of the LEDs.
To protect against damage from high temperatures, the TQ10 Drive has an internal tem-
perature sensor. If the output stage overheats, the red
illuminate, and the drive will shut down. This is a latched fault. To restart the drive, first
allow it to cool, then cycle power; or, with the TQ10 Torque drive, you can use the reset
input. You can prevent overtemperature faults by heatsinking the drive properly (or adding
the -HS3 Heatsink/Fan Unit option), and maintaining ambient temperature at or below 50°C
(122°F).
The TQ10 Drive has short circuit protection. The drive monitors current in its motor output
terminals. When the drive detects a short circuit in the motor or motor cabling, it
illuminates the
MOTOR FAULT
condition. To restart the drive, first fix the short in the motor or cable, then cycle power.
The TQ10 Drive has an internal regeneration resistor. If the motor regenerates—produces
excess energy during deceleration—the drive will automatically dissipate the excess energy
in its regeneration resistor. The power capacity of the resistor is 1KW for one second, or 10
watts on a continuous basis. If the motor regenerates more energy than can be dissipated in
the regeneration resistor, the resulting voltage rise on the drive's motor output terminals can
cause an overvoltage fault (see below).
If excessive regeneration repeatedly causes overvoltage faults, you may need to alter your
move profile, change application conditions, or install an external regeneration resistor (see
Chapter 2, Installation for instructions).
Vertical applications require careful sizing, and should use a mechanical brake to aid in
deceleration.
DRIVE OVERTEMP
LED, and stops producing motor current. This is a latched
LED will