Danfoss VLT 5000 Operating Instructions Manual page 44

P798 – 8: Quick stop input activated
Meaning
The quick stop input has been activated. As a
safety precaution the electromechanical brake is
activated according to the setting of P725 and the
drive is coasted regardless of the setting of P715.
Normal operation is resumed if the error is cleared.
P798 – 9: Controller (PID) tracking error too big
Meaning
The difference between the desired set-point posi-
tion and the actual position read via the encoder
feedback has exceeded the limit specified in P726.
Causes
Several reasons may exist:
1) The encoder is not properly connected.
Check the encoder connection.
2) The encoder is counting positive in the
wrong direction. Switch A- and B-chan-
nels if necessary.
3) The PID controller settings are not pro-
perly optimised. Follow the instructions for
optimising.
4) The limit specified in P726 may be too
low.
P798 – 10: SyncPos option error occurred
Meaning
An internal error on the option card has occurred.
Please note the corresponding error number and
contact Danfoss with a description of the conditions
before and after the error occurred.
P798 – 11: VLT Exception error detected
Meaning
An internal VLT 5000 error was detected during
start-up of the option card program. Please note
the corresponding error number and contact
Danfoss.
Causes
EMC in the environment surrounding the VLT5000
might cause exception errors to arise. If the excep-
tion error occurs at different code addresses it is a
good indication that EMC is causing the trouble. If
the exception error occurs repeatedly at the same
code address it is an indication that the EPROM's
might be damaged
MG.50.P3.02 - VLT is a registered Danfoss trademark
Positioning Controller
P798 – 12: Reverse operation prohibited
Meaning
The drives has been operated in reverse direction
while this was not allowed according to the setting
of P734.
P798 – 13: Forward operation prohibited
Meaning
The drives has been operated in forward direction
while this was not allowed according to the setting
of P734.
P798 – 92: Error from encoder monitoring
Meaning
Open or short circuit in accordance with the dis-
played LED. An error will be displayed even if no
encoder is connected and the monitor is active
(P713 => 100).
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