KEB COMBIVERT F5 Instruction Manual page 176

Diagnostics and Troubleshooting
Error/Message Description
EEnC1
Error Encoder1
EHyb
Error Encoder
Card
E.Hybc
Error Encoder
Card Changed
176
*Additional information at end of section
Cause/Solution/Troubleshoot
Loss of For an incremental encoder interface , the recognition
incremental of encoder channel breakage or defective track triggers
encoder channel a fault if the voltage between two signal pairs (A+/A-,
or differential pair B+/B-, N+/N-) is smaller than 2V. That is, a signal pair
are the same for cannot be at the same level. Channel pair voltages can
TTL encoders. be measured to confi rm.
.
Invalid encoder Check for correct encoder connections/pinout. Incorrect
interface identifi er pinout may drag the encoder board power supply down.
Check encoder card connection to control board for bent
or missing pins and proper connection.
Otherwise, the board may be defective and should be
replaced.
Indicates the This error should automatically clear itself. If not, re-
encoder interface Enter the read-only setting in parameter 0.LF.26.
card has been
changed.
If an incremental encoder does not have N+/N-
(or Z+/Z-) tracks, then the corresponding inputs
on the encoder interface card must be jumpered
high/low. That is, jumper X3A.5 (N+) to X3B.7 (+5V)
and X3A.6 (N-) to X3A.8 (0V Common). In any case,
the N+/N- are not needed and these inputs could
always be jumpered high/low.
If performing a Motor Learn in open-loop, the
incremental encoder interface card could be removed
if an encoder is not connected.
Verify the encoder power ratings & connections
(e.g. Powering a 8-30VDC rated encoder with 5V)
If the encoder A/B phasing is incorrect during the P
Lrn (Pole Position Learn) for a PM motor, this can be
changed in LF.28 Swap Encoder Channels.
During the P Lrn (Pole Position learn), the motor must
be able to move with little friction which may require
either a balanced car or unroped sheave. Additionally,
verify the brake is picking and fully released.