Diagnosis; Diagnosis Via Devicenet Scanner; Diagnosis Via User Program; Device Failure Table - Festo VIFB11-02 Series Manual

VIFB11 - 02
5-60
5. Commisioning

Diagnosis

The following bus diagnoses are available:
•

Diagnosis via DeviceNet scanner

•

Diagnosis via user program

Diagnosis via DeviceNet scanner
The valve terminal reacts on the DeviceNet in
respect of the diagnosis like the equivalent
DeviceNet modules. There are no special error
messages.
Diagnosis via user program
The following diagnostic possibilities are avail-
able via the user program:
•
Evaluation of the device failure table
•
Evaluation of the status bits

Device failure table

The device failure table is divided into several
sections. The section Communications Failure
Bitmap is interesting in conjunction with the
valve terminal. In this section an error bit is set
for every DeviceNet slave, if communication
between the scanner and the slave is inter-
rupted or faulty .
The error bit is set in the valve terminal when
it is not supplied with voltage, when the bus
connection is interrupted (e.g. plug removed)
or when the bus interface is not supplied with
voltage.
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