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254 Unidrive M702 User Guide
Issue Number: 3
EEPROM Fail Default parameters have been loaded
31
The EEPROM Fail trip indicates that default parameters have been loaded. The exact cause/reason of the trip can be
identified from the sub-trip number.
Recommended actions:
• Default the drive and perform a reset
• Allow sufficient time to perform a save before the supply to the drive is removed
• If the trip persists - return drive to supplier
Encoder 1 Drive position feedback interface power supply overload
189
The Encoder 1 trip indicates that the drive encoder power supply has been overloaded. Terminals 13 and 14 of the 15 way
D type connector can supply a maximum current of 200 mA @ 15 V or 300 mA @ 8 V and 5 V.
Recommended actions:
• Check encoder power supply wiring
• Disable the termination resistors (Pr 03.039 set to 0) to reduce current consumption
• For 5 V encoders with long cables, select 8 V (Pr 03.036) and fit a 5 V voltage regulator close to the encoder
• Check the encoder specification to confirm if it is compatible with the encoder port power supply current capability
• Replace the encoder
• Use an external power supply with higher current capability
Encoder 2 Drive encoder (Feedback) wire break
190
The Encoder 2 trip indicates that the drive has detected a wire break on the 15 way D-type connector on the drive. The
exact cause of the trip can be identified from the sub-trip number.
Recommended actions:
• If wire break detection on the drive encoder input is not required, set Pr 03.040 = XXX0 to disable the Encoder 2 trip
• Check cable continuity
• Check wiring of feedback signals is correct
• Check encoder power supply is set correctly (Pr 03.036)
• Replace encoder
Trip Diagnosis
Sub-trip Reason
1 The most significant digit of the internal parameter database version number has changed
2
The CRC's applied to the parameter data stored in internal non-volatile memory indicate that a valid set
of parameters cannot be loaded
3
The drive mode restored from internal non-volatile memory is outside the allowed range for the product
or the derivative image does not allow the previous drive mode
4 The drive derivative image has changed
5 The power stage hardware has changed
6 The internal I/O hardware has changed
7 The position feedback interface hardware has changed
8 The control board hardware has changed
9 The checksum on the non-parameter area of the EEPROM has failed
Sub-trip Reason
10 Drive position feedback interface 1 on any input
20 Drive position feedback interface 2 on any input
11 Drive position feedback interface 1 on the A channel
12 Drive position feedback interface 1 on the B channel
13 Drive position feedback interface 1 on the Z channel
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