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5. Diagnosis and error treatment
5.1
Summary of diagnostic possibilities
Valve terminal with inputs
Diagnostic
Status bits
possibilities
7
Bit 2
0
X
X
X
1
X = not relevant
Brief de
The four status bits are
scription
transmitted to the
module cyclically as
inputs" together with
the normal inputs.
Advantages
fast access to error
messages, irrespective
of the module and the
master
Detailed de
chapter 5.3
scription
Fig. 5/1: Possibilities of diagnosis and error treatment
Festo P.BE−VIFB5−03−EN en 0503e
The modular valve terminal offers extensive and user−friendly
possibilities of diagnosis and error treatment. The following
possibilities are available depending on the fittings on the
valve terminal.
Valve terminal without inputs
LEDs
6
5
4
Bit 2
Bit 2
Bit 2
0
0
0
0
1
X
1
0
X
1
1
X
X
X
X
The LEDs show
directly con
figuration er
rors, hardware
errors, bus er
rors, etc.
fast on−the−
spot" error rec
ognition
chapter 5.2
Diagnostic byte
7
6
5
4
None sc/o
None
V
V
V
out
val
sen
The diagnostic byte must be read out
and evaluated user−program controlled.
Detailed error recognition, depending on
the field bus protocol
chapter 5.4
3
2
1
0
Cycle
None
p.no.
5−3
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