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276 Unidrive M702 User Guide
Issue Number: 3
The 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.
Table 13-6 Trip categories
13.5 Internal / Hardware trips
Trips {HF01} to {HF20} are internal faults that do not have trip numbers. If one of these trips occurs, the main drive processor has detected an
irrecoverable error. All drive functions are stopped and the trip message will be displayed on the drive keypad. If a non permanent trip occurs this may
be reset by power cycling the drive. On power up after it has been power cycled the drive will trip on Stored HF. Enter 1299 in mm.000 to clear the
Stored HF trip.
Priority Category Trips Comments
1 Internal faults
HF01, HF02, HF03, HF04,
HF05, HF06, HF07, HF08,
HF09, HF10, HF11, HF12,
HF13, HF14, HF15, HF16,
HF17, HF18, HF19, HF20
These indicate internal problems and cannot be reset. All drive features
are inactive after any of these trips occur. If an KI-Keypad is installed it will
show the trip, but the keypad will not function.
1 Stored HF trip {Stored HF}
This trip cannot be cleared unless 1299 is entered into Parameter
(mm.000) and a reset is initiated.
2 Non-resettable trips
Trip numbers 218 to 247,
{Slot1 HF}, {Slot2 HF},
{Slot3 HF} or {Slot4 HF}
These trips cannot be reset.
3 Volatile memory failure {EEPROM Fail}
This can only be reset if Parameter mm.000 is set to 1233 or 1244, or if
Load Defaults (11.043) is set to a non-zero value.
4 NV Media Card trips
Trip numbers 174, 175
and 177 to 188
These trips are priority 5 during power-up.
4
Internal 24V and position
feedback interface power
supply
{PSU 24} and
{Encoder 1}
These trips can override {Encoder 2} to {Encoder 6} trips.
5
Trips with extended reset
times
{OI ac}, {OI Brake}, and
OI dc}
These trips cannot be reset until 10 s after the trip was initiated.
5
Phase loss and d.c. link
power circuit protection
{Phase Loss} and
{Oht dc bus}
The drive will attempt to stop the motor before tripping if a {Phase Loss}.
000 trip occurs unless this feature has been disabled (see Action On Trip
Detection (10.037). The drive will always attempt to stop the motor before
tripping if an {Oht dc bus} occurs.
5 Standard trips All other trips
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