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E300 Design Guide 437
Issue Number: 1
9.4 Trip indications
The drive status LED indicator will flash during a drive trip and the keypad will display the trip code.
During a trip condition where a keypad is being used, the upper row of the display indicates that a trip has occurred and the lower row displays the trip
string. Some trips have a sub trip number to provide additional information about the trip. If a trip has a sub trip number, the sub trip number is flashed
alternately with the trip string unless there is space on the second row of the keypad display for both the trip string and the sub trip number in which
case both the trip string and sub trip information are displayed and separated by a decimal place.
9.5 Identifying a trip, trip source
Some trips only contain a trip string whereas some other trips have a trip string along with a sub trip number which provides the user with additional
information on the trip. A trip can be generated from a control system or from a power system.
The sub trip number associated with the trips listed in Table 9-1 Trips associated with xxyzz sub trip number is in the form xxyzz and used to identify
the source of the trip.
Table 9-1 Trips associated with xxyzz sub trip number
The digits xx are 00 for a trip generated by the control system. For a single drive if the trip is related to the power system then xx will have a value of
01, when displayed the leading zeros are suppressed.
The y digit is used to identify the location of a trip which is generated by a rectifier module connected to a power module if xx is non zero). For a
control system trip xx is zero), the y digit, where relevant is defined for each trip. If not relevant, the y digit will have a value of zero.
The zz digits give the reason for the trip and are defined in each trip description.
Figure 9-2 Key to sub-trip number
Example
If the drive has tripped and the lower line of the display shows 'OHt Control.2’, with the help of the Trip indications table the trip can be interpreted as
a “Control stage over temperature” and “Control board thermistor 2 over temperature” with the trip being generated by a fault in the control module.
For further information on individual sub trips, refer to the diagnosis column in the Table 9-15 Serial communications look up table on page 473
Over Volts OHt dc bus
OI ac Phase Loss
OI Brake Power Comms
PSU OI Snubber
OHt Inverter OHt Rectifier
OHt Power Temp Feedback
OHt Control Power Data
xxyzz
0 - Control module trip
xx = 0
1
2 - Drive thermal model
3
xx > 0
1 - Rectifier number
2
00
01
.
.
07
- Reason for the trip
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