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NEG=On/Off:
The Negative option is used to determine if the scale needs to evaluate negative weight values. If NEG = Off,
then the setpoint controller will not evaluate negative weights, as in it will treat both negative and positive weights the same.
Example, if the display shows -10 lbs or +10 lbs, the setpoint evaluator will evaluate these values as positive values. If NEG
= On, then it will differentiate between the two values.
PLAT=PL1:
This option only appears when the scale is equipped with Multiple platforms. The user can select if the setpoint
conforms to a particular platform. If it is the case, then the setpoint will only evaluate weights corresponding to that platform.
PARTS=On/Off:
This option only appears when the scale is equipped with Parts Counting. The user is given a choice of
whether the setpoint should respond to count value instead of weight value.
To change any of these options simply select the appropriate entry in the lower menu and press ENTER.
Creating and Editing Formulas
The formula is a list of up to nine lines that are evaluated and acted upon in the order they are entered.
To access the formula list select EDIT in the lower menu and then press ENTER. All of the current formula lines will be
displayed or “None Defined” if there aren’t any. Using the NEW and INS in the lower menu to add or insert new lines.
Each line consists of four parts. These are CMD (command), EXP (expression), VALUE and OUT. CMD is an action to
take. The only two commands currently available are ON and OFF. EXP is an expression and can be < (less than), <= (less
than or equal to), > (greater than) and >= (greater than or equal to). Value is the setpoint weight value and OUT is the output
channel (1-8) that the CMD command will work on.
For example, a simple formula to activate the output when a certain weight is exceeded is made up of two lines as shown
below:
CMD
EXP
VALUE
OUT
Off
<
5.0
1
Start with light off
On
>=
5.0
1
On if 5 lb or greater
This can be interpreted as:
Line 1: Output #1 is off if weight is less than 5.00 lb
Line 2: Output #1 is on if weight is greater than or equal to than 5.00 lb
You will notice that every output possibility must be dealt with when creating a formula.
The next example represents a much more complicated definition. The scale would have three lights connected to three
outputs and operate in an UNDER / ACCEPT / OVER check weighing scenario.
There will be a red light connected to output #1 to indicat
e an “under” condition, a green light connected to output #2 for an
“accept” condition and a yellow light connected to output #3 to show an “over” condition. We can program the red light to be
on whenever the weight is less than 5lb, the green light to be on only between 5 and 5.2 lb and the yellow light to be on
whenever the weight is above 5.2lb indicating an over condition. In practice, the user would start filling the container until the
green light comes on.
It is less confusing to make a formula of this nature if you deal with the complete operation of one light at a time. We
recommend laying the formula out on paper first and then enter it into the system.
Here it is:
CMD
EXP
VALUE
OUT
On
>
0.00
1
Deal with “under” (red) light first
Off
>=
5.00
1
Off
<
5.00
2
Now the “accept” (green light), to be
On
>=
5.00
2
on only between 5 and 5.2 lb
Off
>
5.20
2
Off
<=
5.20
3
Now the “over” (yellow) light to be on
On
>
5.20
3
anytime the weight is above 5.2
When this formula is executed, the scale evaluates each line in order. This calculation is done in memory only, and the
outputs are not affected until the formula is complete. The entire formula is evaluated on each and every display update,
which is programmable through the system menu.
