User Manual

6. Diagnosis and fault display
6−11
Festo GDCP−SFC−LACI−DN−EN en 0812NH
Error Fault no.
*)
PNUPossible cause and remedy
COMMUTATION
POINT ERROR
Commutation point is invalid.
Possible cause and remedy:
The drive is blocked: Ensure freedom of movement.
Excessive load: Reduce the load.
 Controller parameter wrongly set: Determine the
relevant controller parameter and set it to the
correct value. To do this, you may have to per
form a commutation point search without a load
(remove the load, correctly set the tool mass and
applied load), start the axis, connect the load
(correctly set the tool mass and applied load),
determine the new controller parameters
(see FCT help on controller parameterisation),
reparameterise the drive and then restart the
commutation point search with new controller
parameters.
The drive remains directly at a hard end stop.
Vibration motion is therefore not possible in the
direction of the end stop. The following
conditions are necessary in order to find the
commuting point: Cushion the end points /
makethem soft (e.g.rubber bumper).
The axis is not fastened stiffly enough:
Stiffen the axis mounting.
The effective load is not fastened stiffly enough
on the axis: Stiffen the load mass mounting.
 Effective load can vibrate: Form stiffer load;
modify intrinsic frequency of the load.
 If several drives are fitted in a vibration−free
system: Carry out commutation point search
oneafter the other (see PNU 1072/2051h).
Contact the Festo service department if these
measures do not produce the desired results.
PNU 205
0x8000
41
HARDWARE
ERROR SFC−LACI
Device fault SFC−LACI, e.g.EEPROM defective
· Contact Festo service
PNU 205
0x0001
51
LOAD−POWER−
DOWN
Load voltage < 36 V or missing hardware enable
Voltage drops under load: Power supply too weak,
cable too long, cable cross−section too small?
 Hardware enable connection, see section 3.2
PNU 205
0x0080
70
*)
Fault number in the diagnostic memory, see section 6.4.2.