Festo IFB05-03, Manual

Page: 97 / 154

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