4.2.5 Status bits
The status bits of a valve terminal are used for
displaying internal valve terminal faults, e.g.:
–
voltage below tolerance
–
voltage switched off
–
short circuit or overload
These error messages are treated like inputs
and transmitted to the INTERBUS master
together with the remaining inputs of a valve
terminal. There they can be interrogated, linked
and processed like "normal" inputs.
Further information on the function of the status
bits can be found in Chapter 5 "Diagnosis via
INTERBUS."
The status bits always occupy four addresses of
the configured address range. If the inputs of the
input addresses thereunder are not used, the
valve terminal will set them to "logic zero." The
addresses of the status bits in the address range
of a valve terminal depend, like all inputs/out-
puts, on the INTERBUS module and on the
control system used.
VIFB6 - 03/05 4. Commissioning
4-36
9809c
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