Danfoss VLT 5000 Operating Instructions Manual page 30

No. Parameter
735 Brake wear limit
BRAKE WEAR
LIMIT
736 Power-recovery
POWER RECOVERY
737 Link LCP input to
index
LINK INDEX-
INPUT
MG.50.P3.02 - VLT is a registered Danfoss trademark
Positioning Controller
Default Range
value
0 0 ( = disabled) ...
1,073,741,824 UU
1 0 = disabled
1 = enabled
0 0 = disabled
1 = enabled
Description
Setting a value higher than "0" (disabled)
the drive defines an error situation ("Brake
wear limit exceeded" – P798 = 7) if the
drive moves more than the number of UU
specified in this parameter while the elec-
tronic brake is activated.
When the power recovery function is dis-
abled (0), it is not possible to drive the
application by any means (neither jogging
nor positioning) as long as the application
is outside the HW or SW limits. The only
way to recover from this situation is to
move the application by hand.
When the power recovery function is
activated (1) however it is possible to
make a "partial reset" of the limit error
(P798 = 2/3/4/5) whereby it will be possible
to use the jogging function to drive the
application out of the HW or SW limit area.
It is not possible to drive the application
otherwise by means of homing, positioning
or jogging (in the wrong direction), as long
as the application is still within the HW or
SW limit area.
The "error occurred" output (MK3C 2) will
remain high to indicate that these
restrictions are in effect. As soon as the
application is moved outside the HW or
SW limit area the error is automatically
cleared and the "error occurred" signal
goes low to indicate that normal operation
is now restored.
When activating this function (1) P738 will
be automatically updated with the last posi-
tion reference number that has been loa-
ded into memory. This enables to operator
to see what position reference is currently
given by the PLC system.
The function is deactivated when set to "0".
This is necessary when programming a
position number different from the one
loaded into the PLC memory.
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