BEKA BA484DF, Руководство пользователя

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6.3 Configurable functions
This section provides an explanation of each
configurable function and should be read in
conjunction with Fig 7.
6.3.1 Screens (Display format)
The BA488CF can display up to eight fieldbus
variables. These are identified as IN_1 to IN_8.
The fieldbus variable that each one represents is
determined by the BA488CF configuration at the
fieldbus system host – see the appropriate
Fieldbus Interface Guide .
This sub-menu allows one of nine standard
display formats or a custom format to be selected.
The standard formats contain one, two, three or
four fieldbus variables some with bargraphs as
shown below.
Custom formats, which are identified as ‘Text
Display’ in this menu, require programming which
is explained in the
Fieldbus Display Programming
Guide.
One variable
Two variables
Four variables
One va horizontal bargraph
Two var horizontal bargraphs
One va vertical bargraph
Two var vertical bargraphs
Three var vertical bargraphs
Four var vertical bargraphs
6.3.2 Input Settings
Only included in Profibus PA and Fieldbus
Foundation Revision 1 instruments. Omitted from
Fieldbus Foundation Revision 2 instruments
because these parameter can be easily configured
in the Display Transducer Block.
The Input Setting function is divided into two
groups of sub-functions. The first, ‘BarLimits Src’
is included to maintain backwards compatible with
earlier firmware issues in which fieldbus variables
IN_7 and IN_8 were used to define all the
bargraph limits. This reduced the number of
fieldbus variables that could be displayed with
bargraphs from eight to six.
Version 2.0 firmware includes the improved ‘Per
Input’ option that enables the lower and upper
limits of a bargraph for each of the eight fieldbus
variables to be defined via the front panel push
buttons. It is recommended that ‘Per Input’
option be used for new installations.
In addition to defining individual limits for up to
eight bargraphs, the second group of sub-
functions enables the decimal point position for
each display to be defined. Each of the eight
fieldbus inputs may also be offset and scaled
before being displayed which allows variables to