Troubleshooting - Danfoss ISD Encoder Box Operating Instructions Manual

Faults

8.5 Troubleshooting

When problems occur in the servo system, they must first be located and properly identified.
The following table lists potential faults on the encoder box, their possible causes, and actions for correcting the faults.
If it is not possible to correct the fault, contact Danfoss Service.
Fault
LED "Power" is off although
24 V power supply is
connected.
LED "Run / Err" flashes green for
>1 min.
LED "Run / Err" is lit red
constantly.
LED "CAN I" or "CAN II" is off.
LED "CAN I" or "CAN II" is red
(constantly).
Fault code 5100 (hex)
Fault code 8100 / 8101 (hex)
Fault code 8120 / 8121 (hex)
Fault code 8140 / 8141 (hex)
Fault code FF02 (hex)
Fault code FF05 (hex)
Fault code FF06 (hex)
Fault code FF09 (hex)
Fault code FF0A (hex)
Fault code FF0B (hex)
Fault code FF0F (hex)
Fault code Err1
Fault code Err2
Table 8.4 Troubleshooting Overview
®
VLT ISD Encoder Box Operating Instructions
Possible Cause
•
Cable connected incorrectly.
•
24 V power supply voltage not
present.
Error during initialisation.
Active encoder box error.
No CAN messages on the bus.
Current CAN bus problems on line I
or II.
Power supply failure.
CAN controller error counter reached
limit CAN line I / II.
CAN passive error CAN line I / II.
Bus off CAN line I / II.
Write to log failed.
BiSS encoder is not connected while
start-BiSS command is executed.
Encoder is counting in reverse.
QEP failed to detect zero pulse.
Encoder CRC failure.
Encoder MaxAngleDifference
threshold exceeded.
Incorrect CAN-ID.
Under-voltage during power-up.
SD card not available.
®
MG75F102 - VLT is a registered Danfoss trademark
Possible Solution
•
Check cabling
•
Check 24 V power supply
Carry out a power cycle.
See error codes below.
•
Check cabling
•
Check terminating resistors
•
Check cabling
•
Check terminating resistors
•
Check parameter General.BitRate
•
Check cabling
•
Check 24 V power supply
•
Check CAN cabling and voltage
•
Check terminating resistors
•
Check for EMC interference
•
Check parameter General.BitRate
•
Ensure the SD card is inserted correctly
•
Check if the file-system on the SD card is corrupt
Check cabling to BiSS encoder
•
Check cabling to encoder
•
Check direction parameter for the specific encoder type used
•
Check parameter General.WrongDirectionCheck
•
Check cabling to encoder
•
Check parameter QEP.PulsesPerRevolution
•
Check cabling to encoder
•
Check for EMC interference
•
Check CRCPoly parameter for the specific encoder type used
Check parameter General.MaxAngleDifference in relation to
maximum encoder speed
•
Check parameters General.DefaultCanId and General.BaseCanId
•
Check the BCD switch setting
Check 24 V power supply
•
Ensure the SD card is inserted correctly
•
Ensure the SD card contains the parameter file
8 8
27