ABLE BA688CF-P, Installation & Maintenance Instructions Manual

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10
5.3.2 Input Settings
Each of the eight fieldbus variable inputs may be
scaled before being displayed as shown below.
Display = (Gain x Fieldbus variable) + Offset
The sub-functions for each of the eight inputs are:
‘Offset’
Adds a positive or negative offset to
the fieldbus variable before it is
displayed.
‘Gain’
Multiplies the fieldbus variable by a
factor before it is displayed.
‘Bar Lo’
Defines the bargraph lower limit
‘Bar Hi’
Defines the bargraph higher limit
‘Format’
Defines the position of the displayed
decimal point.
Six options are available:
Auto: Max resolution with selected
display format.
4 DP 4 digits on right of decimal point
3 DP 3 digits on right of decimal point
2 DP 2 digits on right of decimal point
1 DP 1 digit on right of decimal point
0 DP No decimal point
The total number of display digits available
depends upon the display screen selected – see
6.3.1
Screen Description Digits
1 1 variable 5, 7, 11 or 17*
2 2 variables 7
3 4 variables 5
4 8 variables 5
5 1 va H bar 5, 7, 11 or 17*
6 2 var H bars 7
7 1 va V bar 6
8 2 varV bars 4
9 3 var V bars 6
10 4 var V bars 4
11 8 var H bars 5
* Font automatically resizes in auto mode
If a negative number is likely to be displayed, a
digit must be allocated for the negative sign. If the
display overanges all the digits will display ‘?’.
For all options leading zeros, apart from the zero in
front of a decimal point, are automatically
suppressed.
5.3.3 Tags
Each of the eight fieldbus variables may be
displayed with an individual tag that can contain up
to sixteen alphanumeric characters. This menu
allows these tags to be entered. After selecting
the required variable, the tag legend is entered
character by character using the
▼ and ▲ push
buttons. Numbers, upper & lower case letters and
symbols are available.
5.3.4 Units
Each of the eight fieldbus variables may be
displayed with units of measurement that can
contain up to eight alphanumeric characters. This
menu allows these units of measurement to be
entered. After selecting the required variable, the
unit of measurement is entered character by
character using the
▼ and ▲ push buttons.
Numbers, upper & lower case letters and symbols
are available.
5.3.5 Alarms
Alarm menus are only included when the BA688CF-P
is fitted with optional alarm outputs. Outputs are
locally activated from the fieldbus variable and are
configured via the instrument menus and push
buttons. They can not be controlled via the fieldbus.
Each of the six alarms may be linked to any one of
the eight fieldbus variables displayed by the
BA688CF-P. Each alarm output can be
conditioned to function as a high or a low alarm, or
as a combined high and low alarm. The output
can be conditioned as normally open ‘N/O’ or
normally closed ‘N/C’ in the non-alarm condition.
Irrespective of settings all alarm outputs will be
open when the instrument is not powered from the
fieldbus.
When an alarm is activated, the associated
fieldbus variable display flashes, i.e. alternates
between dark figures on a light background and
light figures on a dark background.
There are eight alarm-conditioning sub-menus.
5.3.5.1 Alarm Summary
Shows to which PROFIBUS variable each alarm is
linked and how each alarm has been conditioned.
i.e. high, low, or combined high & low alarm with
normally open or closed output. No adjustments
can be made via this sub-menu.