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198
Digitax ST User Guide
Issue: 5
Table 14-3 Trip categories
Unless otherwise stated, trips cannot be reset until 1.0 s after the trip has been accepted by the drive.
Although the UV trip operates in a similar way to all other trips, all drive
functions can still operate but the drive cannot be enabled. The following
differences apply to the UV trip:
1. Power-down save user parameters are saved when UV trip is
activated except when the main high voltage supply is not active
(i.e. operating in Low Voltage DC Supply Mode, Pr
6.44
= 1).
2. The UV trip is self-resetting when the DC bus voltage rises above
the drive restart voltage level. If another trip is active instead of UV at
this point, the trip is not reset.
3. The drive can change between using the main high voltage supply
and low voltage DC supply only when the drive is in the under
voltage condition (Pr
10.16
= 1). The UV trip can only be seen as
active if another trip is not active in the under voltage condition.
4. When the drive is first powered up a UV trip is initiated if the supply
voltage is below the restart voltage level and another trip is not
active. This does not cause save power down save parameters to be
saved at this point.
14.2 Alarm indications
In any mode an alarm flashes alternately with the data displayed 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 640 ms except "PLC" which flashes once
every 10 s. Alarms are not displayed when a parameter is being edited.
Table 14-4 Alarm indications
Priority
Category
Trips
Comments
1
Hardware faults
HF01 to HF16
These indicate serious internal problems and cannot be reset. The
drive is inactive after one of these trips and the display shows
HFxx.
2
Non-resetable trips
HF17 to HF32, SL1.HF, SL2.HF,
SL3.HF
Cannot be reset.
3
EEF trip
EEF
Cannot be reset unless a code to load defaults is first entered in
Pr
x.00
or Pr
11.43
.
4
SMARTCARD trips
C.Boot, C.Busy, C.Chg, C.Optn,
C.Rdo, C.Err, C.dat, C.FULL,
C.Acc, C.rtg, C.Typ, C.cpr,
C.Prod
SMARTCARD trips have priority 5 during power up.
4
Encoder power supply trips
PS.24V, EnC1
These trips can only override the following priority 5 trips: EnC2 -
EnC8 or Enc11 - En17
5
Normal trips with extended
reset
OI.AC, OI.br, OIAC.P, OIbr.P,
OidC.P
Can be reset after 10.0s
5
Normal trips
All other trips not included in this
table
Can be reset after 1.0s
5
Non-important trips
Old1, cL2, cL3, SCL
If bit 0 of Pr
10.37
is 1 the drive will stop before tripping.
5
Phase loss
PH
The drive attempts to stop before tripping.
5
Drive over-heat based on
thermal model
O.ht3
The drive attempts to stop before tripping, but if it does not stop
within 10s the drive will automatically trip.
6
Self resetting trips
UV
Under voltage trip cannot be reset by the user, but is automatically
reset by the drive when the supply voltage is with specification.
Lower
display
Description
br.rS
Braking resistor overload
Braking resistor I
2
t accumulator (Pr
10.39
) 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 (Pr
4.19
) 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 10 s.