User guide

Unidrive SP Short Form Guide 117
Issue Number: 2 www.controltechniques.com
Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting Started Basic parameters
Running the
motor
SMARTCARD
Advanced
parameters
Diagnostics
UL Listing
Information
Alarm indications
In any mode an alarm flashes alternately with the data displayed on the 2
nd
row when
one of the following conditions occur. If action is not taken to eliminate any alarm except
"Autotune", "Lt" and "PLC" the drive may eventually trip. Alarms flash once every 640ms
except "PLC" which flashes once every 10s. Alarms are not displayed when a
parameter is being edited.
Table 10-2 Alarm indications
UV DC bus under voltage threshold reached
1
Check AC supply voltage level
Drive voltage rating (Vac) Under voltage threshold (Vdc) UV reset voltage (Vdc)
200 175 215
400 350 425
575 & 690 435 590
Trip Diagnosis
Lower display Description
br.rS Braking resistor overload
Braking resistor I
2
t accumulator (Pr 10.37) in the drive has reached 75.0% of the value at which the drive will trip
and the braking IGBT is active.
Hot Heatsink or control board or inverter IGBT over temperature alarms are active
• The drive heatsink temperature has reached a threshold and the drive will trip O.ht2 if the temperature
continues to rise (see the O.ht2 trip).
Or
• The ambient temperature around the control PCB is approaching the over temperature threshold (see the
O.CtL trip).
OVLd Motor overload
The motor I
2
t accumulator in the drive has reached 75% of the value at which the drive will be tripped and the
load on the drive is >100%
Auto tune Autotune in progress
The autotune procedure has been initialised
‘Auto’ and ‘tunE’ will flash alternatively on the display.
Lt Limit switch is active
Indicates that a limit switch is active and that it is causing the motor to be stopped (i.e. forward limit switch with
forward reference etc.)
PLC Onboard PLC program is running
An Onboard PLC program is installed and running. The lower display will flash ‘PLC’ once every 10s.