Rice Lake 920i Installation Manual V4.0 - Manual (Page 27)

Configuration 21
3.1.2 Serial Command Configuration
The serial command set can be used to configure the
920i indicator using either a personal computer,
terminal, or remote keyboard. Like iRev 4 , serial
command configuration sends commands to the
indicator serial port; unlike
iRev 4 , serial commands
can be sent using any external device capable of
sending ASCII characters over a serial connection.
Serial commands duplicate the functions available
using the indicator front panel and provide some
functions not otherwise available. Serial commands
can be used to simulate pressing front panel keys, to
configure the indicator, or to dump lists of parameter
settings. See Section 9.0 on page 86 for more
information about using the serial command set.
3.1.3 Front Panel Configuration
Use the CONFIG submenu under the SCALES menu
to configure A/D scales. For example, in an indicator
with a single-channel A/D card installed in Slot 1, the
Scale Configuration display will show the A/D listed
(
Slot 1 Channel 1 ) under the AVAILABLE A/D’s column.
Use the left navigation key to select the A/D, then
press the center softkey, Add . The A/D is then moved
to the Associated A/D’s column. If no other A/D’s are
listed in the
AVAILABLE A/D’s column, the center
softkey changes to Done , as shown in Figure 3-2.
Press Done to exit the Scale Configuration display.
See Section 10.4 on page 108 for information about
configuring serial scales.
Figure 3-2. Scale Configuration Display
3.1.4 Multi-Range and Multi-Interval Scales
The 920i supports multi-range and multi-interval
scales of either two or three ranges or intervals.
Multi-range scales provide two or three ranges, each
extending from zero to the maximum capacity
specified for the range, that can specify different scale
intervals (graduations). The scale interval changes as
the applied weight increases but does not reset to
lower range intervals until the scale returns to zero.
Multi-interval scales divide the scale into two or three
partial weighing ranges, each with different scale
intervals. The scale interval changes with both
increasing and decreasing loads applied.
To configure a multi-range or multi-interval scale, use
the SPLIT parameter to select 2RNG or 3RNG (for
multi-range scales), or 2INTVL or 3INTVL (for
multi-interval scales). Selecting a SPLIT value other
than OFF allows specification of decimal point,
display divisions, and maximum capacity for each
range or interval.
3.1.5 Total Scale Configuration
The output of two or more A/D scales or iQUBE 2
systems can be configured to function as a total scale.
Once configured and calibrated, the total scale can be
used as a source for other system functions, including
streaming, setpoints, print formatting, and analog
output.
To set up a total scale from the indicator front panel,
use the scale configuration display (see Figure 3-2) to
select the A/D scales or
iQUBE 2 systems to configure
as a total scale. (Use the Change Type softkey to show
available A/D scales or iQUBE 2 systems; use the right
navigation key to select the total scale sources.) In
iRev 4 , assign the total scale to an unused position then
select source scales from the existing A/D scales or
iQUBE 2 systems.
The FORMAT configuration of the total scale (see
Figure 3-5 on page 27) should match that of the
source scales. However, the value specified for the
total scale GRADS parameter should be specified as
the sum of the GRADS values for the source scales.
For example: if SCALE 1 is set to GRADS=10000,
SCALE 2 to GRADS=5000, SCALE 3 (the total
scale) should be set to 15000 grads.
The total scale will show an overrange indication if
the ma ximum capacity of any source scale is
exceeded, and show dashes if any source scale reads a
negative value. Source scales will respond to Tare and
Zero operations performed on the total scale.