Rice Lake 520 HMI Digital Weight Indicator Installation Manual - Manual (Page 53)

47 520 Indicator Installation Manual
7.0 Checkweigh Mode
The 520 provides a checkweigh mode that can be
enabled for either absolute values (ABS) or percent
values (PERCENT).
Checkweighing Modes
• ABSOLUTE allows you to enter actual weight
values for over and under (values can be either
positive or negative).
• PERCENT allows you to enter a target weight
value and percentages of this value (in whole
percent values) for over and under.
Autoprint Modes
• WAITSS print mode performs an automatic
print any time the weight settles out of motion
within the ACCEPT range. The autoprint is
reset each time the scale goes into motion and
then achieves standstill within the acceptable
weight range.
• TARGET print mode performs automatic print
any time the weight settles out of motion
within the ACCEPT range. To reset, the scale
weight must return to within the zero band, as
specified in the CKZBAND parameter, and
then achieve standstill again within the
acceptable weight range.
Table 7-1. Checkweigh Ranges/Active Digital Output
Range Active Digital Output
UNDER D/O 1
ACCEPT D/O 2
OVER D/O 3
In checkweigh mode there is an accompanying
bargraph displayed on the secondary display. The
underrange presentation is from the right side to the
center. During the ACCEPT bandwidth, the prompt
ACCEPT
is displayed. The overrange presentation is
from the center to the left side (see Figure 7-1).
The value for the underrange determines the bargraph
bandwidth for both the under- and overrange.
Therefore, if the underrange is 0 to 10 pounds, the
overrange also represents a 10 pound range.
"$$&15
0WFS
3BOHF
6OEFS
3BOHF
"DDFQU
3BOHF
Figure 7-1. Bar Graph Ranges
A tare can be entered to allow net mode check
weighing. When a tare weight is entered, the ACCEPT
range uses net values, but the under- and overrange
bargraph continue to track gross weight.
The ABSOLUTE mode can be used to check weight in
either the gross or net mode. However, for check
weighing around zero (negative under value), the
entered values should be net values. In the absolute
mode, when a negative gross value is entered, the
bargraph only displays the ACCEPT range.