Owner's manual

5. Diagnostics and error handling
5−27
Festo P.BE−CPX−CMAX−SYS−EN en 0908NH
Malfunction group 8  Displacement encoder error
CPX error group 108 (CPX−MMI: [Encoder error])
No. Message Cause/description Error handling Type
1)
80 Communication with
measur in g system/sen
sor interface is disturbed
or measuring system/
sensor interface not
Position measurin g system
/ sensor interface was not
detected at switch−on.
· Exchange the position
measur in g system /
sensor interface. Check
cabl es .
Error level: F2
Reset: N
sensor interface not
av ai labl e
Communication between
the CMAX and position
measur in g system / sensor
interface disturbed.
· Check the lines of the
axis string, valve and dis
placemen t encoder/
sensor interface step−by−
step and exchan ge, if
necessary.
81 Hardware of measuring
system / sensor inter
face is defective
Hardware of di splacement
encoder / sensor interface
is defective.
· Replace the displace
ment encoder/sen sor
in terface.
Error level: F2
Reset: N
Error while initialising the
displacement encoder /
sensor interface.
· Exchange the displace
ment encoder/sen sor
in terface, check the
firmware version of the
CMAX.
82 Inv alid position values or
measur in g system error
DGCI: No magnet pr esen t. · Check the magn et on
the displacement en
coder. Exchange the
magnet holder, if
necessary.
Error level: F2
Reset: F
DGCI: Several magnets
presen t.
· Make sure of the follow
ing: No external magnets
are allowed in the direct
proximity of the dis
placemen t encoder .
DGCI: Multiple pulses (e.g.
due to vibrations).
· Check the structure.
· Avoid vibrations.
DNCI: Sen sor error . · Exchange the sensor
head in the DNCI, if
necessary.
Poten tiom eter: Operating
voltage drops under 12 V.
· Check the operatin g
vol tage, check cables
for short ci rcuit and
corrosion.
1)
For the error level and reset type, see section 5.2.3.