Instruction Manual
6. Diagnosis and fault display
6−11
Festo P.BE−GDCP−SFC−LACI−PB−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), repara
meterise the drive and then restart the commuta
tion 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 condi
tions are necessary in order to find the com
muting 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
oneafter 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−L ACI
Device error in the SFC−LACI, e.g. defective EEPROM
or PROFIBUS initialisation error
· Contact Festo ser vice
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.