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196
Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
Trips can be grouped into the following categories. It should be noted that a trip can only occur when the drive is not tripped, or is already tripped but
with a trip with a lower priority number.
Unless otherwise stated trips cannot be reset until 1.0s after the trip has been accepted by the drive.
Power module trips
Trips 101 to 110 are power module trips that are initiated by the drive power electronics module, or modules for a multi-module parallel drive. The trip
identifier for each of these trips is in the form "xxxx.P". If the drive is a single module drive, and does not use the power interface intended for parallel
operation, (SP4xxx to SP6xxx only) OIdC.P, Oht4.P and Unid.P power module trip are possible. When the trip string is displayed the trip source
module number is not displayed and the module number stored in the "module number and trip time log" is zero. If the drive is a multi-module parallel
drive or a single module drive using the power interface intended for parallel operation (SPMAxxxx and SPMDxxxx) all the power module trips are
possible, the trip source module is displayed with the trip string and the module number is stored in the log. A PH.P trip is initiated if some, but not all
parallel modules detect mains loss via their input stage to ensure that the input stages of the remaining modules are not overloaded. If mains loss is
detected by all modules then the normal mains loss system based on DC bus monitoring is used. A PH.P trip occurs if any modules detect phase loss
via their input stage.The normal phase loss system which detects phase loss from DC bus voltage ripple cannot be used in case different phases
have been lost by different modules or if the system is a 12 pulse or higher system.
Braking IGBT control
The braking IGBT continues to operate even when the drive is not enabled (except if the active supply is a low voltage supply, see Pr
6.44
), but is only
disabled if any of the following trips occurs or would occur if another trip had not already become active: OI.br, PS, It.br or OV or any HFxx trip.
UU trip
It should be noted that although the UU 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 UU trip:
1. Power down save user parameters are saved when UU trip is activated except when the main high voltage supply is not active (Pr
6.44
= 1).
2. The UU trip is self-resetting when the DC bus voltage rises above the drive restart voltage level. If another trip is active instead of UU at this point,
the trip is not reset.
3. The drive can change between using the main high voltage supply and low voltage battery supply only when the drive is in the under voltage
condition (Pr
10.16
= 1). The UU 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 UU 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.
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
SMART card 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
SMART card 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
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 reseting trips
UU
Under voltage trip cannot be reset by the user, but is automatically
reset by the drive when the supply voltage is with specification.
Summary of Contents for unidrive sp
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