Control Techniques UNIDRIVE M701 User Manual

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Display Messages
Alarm indications
Trip codes
Alarm string Description
Brake resistor Brake resistor overload. Braking resistor thermal accumulator (10.039) in the drive has
reached 75.0% of the value at which the drive will trip.
Motor overload Motor protection accumulator (04.019) in the drive has reached 75.0% of the value at
which the drive will trip and the load on the drive is >100%.
Inductor overload Regen inductor overload. Inductor protection accumulator (04.019) in the drive has
reached 75.0% of the value at which the drive will trip and the load on the drive is
>100%.
Drive overload Drive over temperature. Percentage of drive thermal trip level (07.036) in the drive is
greater than 90%.
Autotune The autotune procedure has been initialized and an autotune in progress.
Limit switch Limit switch active. Indicates that a limit switch is active and that is causing the motor
to be stopped.
Display Description - troubleshooting tips
Over volts • Increase deceleration ramp (Pr 00.004).
• Decrease the braking resistor value (staying above the minimum value).
• Check nominal AC supply level.
OI.AC • Acceleration/deceleration rate is too short.
• If seen during auto-tune reduce the voltage boost.
• Check for short circuit on the output cabling.
Encoder2 • Ensure that the position feedback device type selected in Pr 03.038 is correct for the
position feedback device connected to the P1 interface on the drive.
• If wire break detection on the drive encoder input is not required, set Pr 03.040 =
XXX0 to disable the encoder 2 trip.
• Check cable continuity.
• Check wiring of feedback signals is correct.
• Check encoder power supply is set correctly (Pr 03.036).
Status indications
For other display messages and trip codes with more recommended actions please refer to the
Unidrive M700/M701/M702 Control User Guide or to the mobile Diagnostic Tool app.
Display Description
Inhibit The drive is inhibited and cannot be run.
Ready The drive is ready to run.
Stop The drive is stopped/holding zero speed.
Run The drive is active and running.
Trip The drive has tripped and no longer controlling the motor.
Under voltage The drive is in the under voltage state either in low voltage or high
voltage mode.

Control Techniques UNIDRIVE M701 Specifications

General

Brand	Control Techniques
Model	UNIDRIVE M701
Category	Servo Drives
Language	English