Safety
Information
Introduction
Product
Information
System
configuration
Mechanical
Installation
Electrical
Installation
Getting
Started
Basic
parameters
Running
the motor
Optimization
SMARTCARD
operation
Onboard
PLC
Advanced
parameters
Technical
Data
Diagnostics
UL Listing
Information
Unidrive SPM User Guide
281
Issue Number: 3 www.controltechniques.com
O.ht3
Drive over-temperature based on thermal model
27
The drive will attempt to stop the motor before tripping. If the motor does not stop in 10s the drive trips immediately.
Check enclosure / drive fans are still functioning correctly
Check enclosure ventilation paths
Check enclosure door filters
Increase ventilation
Decrease acceleration / deceleration rates
Reduce duty cycle
Reduce motor load
Oht4.P
Power module rectifier over temperature or input snubber resistor over temperature (size 4 and above)
102
Check for supply imbalance
Check for supply disturbance such as notching from a DC drive
Check enclosure / drive fans are still functioning correctly
Check enclosure ventilation paths
Check enclosure door filters
Increase ventilation
Decrease acceleration / deceleration rates
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
OI.AC
Instantaneous output over current detected: peak output current greater than 225%
3
Acceleration /deceleration rate is too short.
If seen during autotune reduce voltage boost Pr
5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
Check feedback device mechanical coupling
Check feedback signals are free from noise
Is motor cable length within limits for that frame size?
Reduce the values in speed loop gain parameters – Pr
3.10
, Pr
3.11
and Pr
3.12
(and servo modes only)
Has offset measurement test been completed? (servo mode only)
Reduce the values in current loop gain parameters - Pr
4.13
and Pr
4.14
(closed loop vector and servo modes only)
OIAC.P
Power module over current detected from the module output currents
104
Acceleration /deceleration rate is too short.
If seen during autotune reduce voltage boost Pr
5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
Check feedback device mechanical coupling
Check feedback signals are free from noise
Is motor cable length within limits for that frame size?
Reduce the values in speed loop gain parameters – Pr
3.10
, Pr
3.11
and Pr
3.12
(closed loop vector and servo modes only) (closed
loop vector RFC mode)
Has offset measurement test been completed? (servo mode only)
Reduce the values in current loop gain parameters - Pr
4.13
and Pr
4.14
(closed loop vector and servo modes only) (closed loop
vector RFC mode)
OI.br
Braking transistor over-current detected: short circuit protection for the braking transistor activated
4
Check braking resistor wiring
Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
OIbr.P
Power module braking IGBT over current
103
Check braking resistor wiring
Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
OIdC.P
Power module over current detected from IGBT on state voltage monitoring
109
Vce IGBT protection activated.
Check motor and cable insulation.
O.Ld1
Digital output overload: total current drawn from 24V supply and digital outputs exceeds 200mA
26
Check total load on digital outputs (terminals 24,25,26)and +24V rail (terminal 22)
Trip
Diagnosis