4. Faults and diagnostics
4−29
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
Fault group 8 measuring system error
CPX error group 108 (CPX−MMI: [Encoder error] )
No. Message Cause/description Error handling Type
1)
80 Faulty communication with
the measurin g system/
sensor interface or no
measur in g system/sen sor
Position measuri ng sys
tem / sensor interface was
not detected when switch
ing on.
· Exchange position
measur in g system /
sensor interface, check
the cables.
Level: F2
Reset: N
Info: x
interface present
Communication between
the CMAX and the position
measur in g system faulty.
· Check the cables of the
axis string, the valve
and the measuri ng sys
tem/sen s or interface
step by step and ex
chan g e , if necessary.
81 Hardware of the measur
ing system or sensor inter
face faulty
Hardware of the measur
ing system or sensor inter
face faulty.
· Replace the measurin g
system/sensor inter
face.
Level: F2
Reset: N
Info: x
Fault in initialization of the
measur in g system / sen
sor interface.
· Exchange measuri ng
system/sensor inter
face, check firmware
update of the CMAX.
82 Inv alid measured values or
measur in g system error
DGCI: no magnet avai l
able.
· Check magnet with the
measur in g system, ex
chan g e proximity sen
sor if necessary.
Level: F2
Reset: F
Info: x
DGCI: several magn ets
presen t.
· Ensure: no other
magnets permi tted in
the immediate vicini ty
of the measurin g sys
tem.
DGCI: e.g.: multiple sig
nals (e.g. due to vibra
tion s ).
· Check structure.
· Avoid vibration .
DNCI: sensor error. · Exchange sensor head
in the DNCI if necessary.
Poten tiom eter: Operating
voltage drop below 12 V.
· Check operatin g volt
age, check cables for
short circuit and cor
rosion.
1)
Level: fault level, see section 4.2.3; (can alternati v ely be parametrised as a warning or error)
Reset: behavi our upon reset, see section 4.2.4
Info: = no info; x = additional info, see FCT or section 4.3.3
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