Danfoss VLT 5000 Operating Instructions Manual page 38

5. Press the [START] button on the VLT 5000 control panel and wait for the AMA to be
completed.
6. Set the frequency for a low positive value, for example +3 Hz in Parameter 003 please
note that motor should now rotate.
7. Press the [START] button on the VLT 5000 control panel and then the [STOP/Reset]
button watching the direction of rotation on the motor. If the motor rotates in the wrong
(negative) direction then exchange the motor phases.
When you have tested the motor speed direction you test encoder connection as follows, if an
incremental encoder is used go to step 10, if an absolute encoder is used go to step 8:
8. If you are using a VLT 5000 Flux remember to use MK3B as input for the absolute
encoder and enter "1" in parameter 748. Then enter the absolute encoder type and
resolution in parameter 713 and 714.
9. Repeat step 8 to 10 to test the encoder direction.
10. Press the [DISPLAY/STATUS] button on the VLT 5000 control panel. Now the following
values appear in the upper line of the display: Error status, PID tracking error, actual
position.
11. Rotate the slave drive motor shaft manually in the positive direction (you can repeat step
7). Now the display should show an ascending count of the actual position.
12. If the count is descending with an incremental encoder, exchange the feedback encoder
track A by B and A/ by B/. If there is no counting in the display then check the wiring of the
encoder.
When you have tested the encoders and the wiring of motor and encoders, continue as follows:
13. Change parameter 002 back to "Remote" and start the VLT 5000 by pressing the
[START] button on the local control panel (LCP).
14. Select "Enable syncpos" in P700
15. Reset any error by toggling input 27.
Now you come to the test run:
16. Drive the application back and forth by closing the contacts on terminal 53 (positive
direction) or terminal 54 (negative direction). Watch the PID track error via the LCP
display during these tests.
Now you can optimise the controller:
17. Optimise the Feed forward velocity P707 by following the procedure described in the
parameter list for P710 parameter (the FFVEL auto-calculation function).
18. If the track error after entering "2" in parameter 710 is within specification, when jogging,
there is no reason to optimise any further, move to step 21.
19. Increase the P-portion par. 702. After each change you should make a test run to find the
right setting. If the drive becomes unstable or if a message is given about over-voltage or
over-current, then reduce the value in parameter 702 to about 70-80% of the set value.
20. Increase the other PID parameters P703 (if needed) by following the same approach.
Read the description concerning these parameters in the parameter list.
To store the optimised values
21. Change the value of parameter 777 to "1". When the value returns to "0" the parameters
have been successfully saved (see the parameter list for a description of how the P777
parameter works).
MG.50.P3.02 - VLT is a registered Danfoss trademark
Positioning Controller
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