5. CONFIGURATION
Configuration Description Default Options
Quality
Symbol variable which stor-
age the internal point quality
-
QUALITY type variables
(LibRtuStandard), which
can be simple, array or
array’s element and can be
part of a struct.
Table 49: Internal Points Configuration
The figure below show an example of two internal points configuration:
Figure 52: Internal Points Configuration Example
5.1.5.1. Quality Conversions
The internal point’s quality is a trust level information about the value stored on that point. The quality may inform, for
example, that the value stored is out of range, or yet that it is valid, but low trusted.
The Standards IEC 61850, DNP3 and IEC104 have their own formats to representation of point’s quality information. The
Nexto Series, by its turn, have its own quality format (but quite similar to IEC 61850) called Internal Quality. This format is
defined by type QUALITY (library LibRtuStandard) and it is used internally to quality storage, allowing to be done conversion
between protocols without information loss.
When it is done a mapping of a same communication point between two drivers, the quality conversion is automatically
realized in two steps. For example: in case a communication point is mapped from a DNP3 Client driver to a IEC104 Server
driver, first the quality will be converted from DNP3 format to internal format (and stored internally in the CPU), after that it
will be converted from the internal format to IEC104 format.
The following tables define the protocols own formats conversion to internal format. Case it is necessary to consult the
conversion between protocols, it is needed to analyze in two steps, looking each of the tables to internal format and after
correlating them.
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