Q5:
The correct target position is reached, but the PID tracking error (P797) is too big while the drive
moves.
A5:
Harder settings of the PID controller may be required – re-optimise the PID controller parameters
(par. 702-709).
Q6:
The option sometimes seems to forget changes to trajectory data.
A6:
Changes to trajectory data values are not stored after power-down unless par. 777 (STORE DA-
TA) is activated before power-down.
6.2. Error Messages
All messages are shown in P789 in the VLT 5000 LCP display. You can find detailed information,
additional notes on possible causes of errors as well as tips for clearing errors in the following
section.
P19-93 - 0: Status OK. No errors detec-
ted.
Meaning
No errors detected.
P19-93 - 1: Homing needed
Meaning
The user has issued a positioning command to a certain position while the home position is not
defined.
NOTE: The error must be cleared and a homing sequence successfully completed before the next
position command is issued to the application.
P19-93 - 2: Positive hardware limit ex-
ceeded
Meaning
The positive hardware switch input has been activated.
Causes
The application has hit the positive limit marker switch. Alternatively, the connection to the limit
switch has been lost or the limit switch is defective.
P19-93 - 3: Negative hardware limit ex-
ceeded
Meaning
The negative hardware switch input is activated.
Causes
The application has hit the negative limit marker switch. Alternatively, the connection to the limit
switch has been lost or the limit switch is defective
6. Troubleshooting
MCO351 Positioning Controller
42
MG.33.R1.02 - VLT
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is a registered Danfoss trademark
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