Rice Lake 720i Programmable Indicator/Controller - Installation Manual - Manual (Page 25)

Configuration 19
3.1.2 Serial Command Configuration
The serial command set can be used to configure the
720i indicator using either a personal computer,
terminal, or remote keyboard. Like Revolution III ,
serial command configuration sends commands to the
indicator serial port; unlike
Revolution III , 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 10.1 on page 86 for more
information about using the serial command set.
3.1.3 Front Panel Configuration
By default, the 720i is configured to use the installed
single-channel A/D as the source for Scale 1. To
configure the
720i for serial scale support, use the
CONFIG submenu under the SCALES menu.
For example: to configure a serial scale, set the serial
input function (SERIAL menu) for Port 4 (or Port 7, if
using a serial expansion card) to SCALE or INDUST
(see Section 3.2.2 on page 33). Return to the top-level
S C A L E S m e n u , t h e n g o
D o w n t o S c a l e 1
Configuration, Right to CONFIG (Scale Hardware
Configuration), then Down once more to show the scale
source options. Use the Right or Left navigation key to
change the default A/D value to PORT 4 (or PORT 7 ) as
shown in Figure 3-3.
CONFIG
PORT 4
Figure 3-3. Scale Hardware Configuration Display
See Section 11.3 on page 102 for more information
about configuring serial scales.
3.1.4 Multi-Range and Multi-Interval Scales
The 720i 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
display divisions. The scale interval range changes as
the applied weight increases but does not reset to lower
range until the scale returns to zero.
Multi-interval scales divide the scale into two or three
partial weighing ranges, each with different scale
display divisions. 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.
The SPLIT parameter is used to enable multi-range or
multi-interval. The SPLIT parameter is in the SCALES
menu, see Figure 3-7, and Table 3-2. After setting the
SPLIT parameter, the
Format menu selection will
change as shown in Figure 3-9, and Table 3-4.
If using streaming with multi-range or multi-interval,
the stream must be set to Custom in
Revolution III . The
Tokens for Secondary and Tertiary Units must be set to
L or K to match the Primary, refer to the Serial Menu,
Tokens Parameter, in Section 3.2.2 on page 33. They
can be set using
Revolution III or through the front
panel.
In multi-range, each range has its own capacity and
display division, extending from zero. The scale
display division will increase at the entered range
capacities, either two or three ranges. Once the range
has increased to the next level, the display division will
remain in new range until the scale returns to zero. The
tare value can be taken in any range.
For example,
Range 1 is 0 - 3000 x 1 lb.
Range 2 is 0 - 10,000 x 5 lb.
In multi-interval, the scale has one capacity, which is
segmented into weighing intervals, either two or three
intervals, each with different display division sizes. As
the weight value exceeds an interval or set interval, the
display division will increase, as the weight falls below
an interval or set interval, the display division will
decrease. The tare can only be taken in the first
interval.
For example,
Range 1 is 0-30 x 0.01 lb.
Range 2 is 30 - 60 x 0.02 lbs.