35
Cycle Mode
–
CYCLE=On/Off:
The cycle option is used to create an operation cycle as described earlier in this section.
Negative Reading
–
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.
Parts Counting
–
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 5lb or greater
This can be interpreted as:
Line 1: Output #1 is off if weight is less than 5.00lb
Line 2: Output #1 is on if weight is greater than or equal to than 5.00lb
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 indicate 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 5.2lb 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
<
5.00
1
// Deal with “under” (red) light first
Off
>=
5.00
1
Off
<
5.00
2
// Now the “accept” (green light), to be
on only between 5 and 5.2lb
On
>=
5.00
2
