5. Diagnostics and error handling
5−28
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
Malfunction group 8 Displacement encoder error
CPX error group 108 (CPX−MMI: [Encoder error]) Continued
No. Message Cause/description Error handling Type
1)
84 Reference position of dis
placemen t encoder was
lost
Although the controller
has set the Referenced"
status, the displacement
encoder/s en sor interface
signalled Not refer
enced" .
· Reference again. Error level: F2
Reset: N
85 Oper atin g voltage of
measur in g system /
sensor interface is out of
specified tolerance ran ge
(und ervoltage)
The op eratin g voltage of
the displacement encoder
is too low .
· Check the power
supply.
· Check the cables on
the axis string.
Error level: F2
Reset: F
87 Defective measuring sys
tem cable or measurin g
system in the electrical
end −pos iti on (potentio
meter only )
Defective displacement
encoder cable.
· Check the power
supply.
· Check the cables on
the axis string.
· It might be necessary
to switch it off and on
again.
· Exchange the sensor
or sensor interface,
if necessary.
Error level: F2
Reset: N
Displacement en coder in
the electrical end position
(potenti ometer only )
· Move the displace
ment encoder (poten
tiometer) away from
the end position.
1)
For the error level and reset type, see section 5.2.3.