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Unidrive M100 User Guide 135
Issue Number: 1
12.6 Alarm indications
In any mode, an alarm is an indication given on the display by alternating the alarm string with the drive status string display. If an action is not taken
to eliminate any alarm except "tuning and LS" the drive may eventually trip. Alarms are not displayed when a parameter is being edited.
Table 12-4 Alarm indications
12.7 Status indications
Table 12-5 Status indications
Table 12-6 Status indications at power-up
12.8 Displaying the trip history
The drive retains a log of the last ten trips that have occurred. Trip 0 (10.020) to Trip 9 (10.029) store the most recent 10 trips that have occurred
where Trip 0 (10.020) is the most recent and Trip 9 (10.029) is the oldest. When a new trip occurs it is written to Trip 0 (10.020) and all the other trips
move down the log, with oldest being lost. The date and time when each trip occurs are also stored in the date and time log, i.e. Trip 0 Date (10.041)
to Trip 9 Time (10.060). The date and time are taken from Date (06.016) and Time (06.017). Some trips have sub-trip numbers which give more detail
about the reason for the trip. If a trip has a sub-trip number its value is stored in the sub-trip log, i.e. Trip 0 Sub-trip Number (10.070) to Trip 9 Sub-trip
Number (10.079). If the trip does not have a sub-trip number then zero is stored in the sub-trip log.
The trip logs can be reset by writing a value of 255 in Pr 10.038.
Alarm string Description
br.res
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.
OV.Ld
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 %.
d.OV.Ld Drive over temperature. Percentage Of Drive Thermal Trip Level (07.036) in the drive is greater than 90 %.
tuning
The autotune procedure has been initialized and an
autotune in progress.
LS Limit switch active. Indicates that a limit switch is active and that is causing the motor to be stopped.
Lo.AC Low voltage mode. See Low AC Alarm (10.107).
I.AC.Lt Current limit active. See Current Limit Active (10.009).
String Description Drive output stage
inh
The drive is inhibited and cannot be run. Either the drive enable signal is not applied to the drive enable
terminals or Pr 06.015 is set to 0.
Disabled
rdy
The drive is ready to run. The drive enable is active, but the drive inverter is not active because the final
drive run is not active.
Disabled
Stop The drive is stopped / holding zero speed. Enabled
AC Supply loss condition has been detected. Enabled
dc.inj The drive is applying dc injection braking. Enabled
Er The drive has tripped and no longer controlling the motor. The trip code appears in the display. Disabled
UV The drive is in the under voltage state either in low voltage or high voltage mode. Disabled
String Status
PS.LOAD Waiting for power stage
The drive is waiting for the processor in the power stage to respond after power-up
NOTE