Rockwell Automation Arena Packaging Users Guide - Manual (Page 47)

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R EMARKS
Controls are evaluated at discrete times, NOT continously. By default, control conditions
are evaluated every time the status of the equipment changes. You can also specify that
control conditions are evaluated every X time units or X units processed or conveyed.
More frequent evaluations may make the control more accurate, but also may slow the
execution speed of the model. We suggest that you use the check boxes to target evaluation
as closely as possible to obtain the accuracy needed without having unnecessary evaluations
performed.
A control is activated whenever it is evaluated and becomes true. It is only activated when
it changes from false to true. If it stays true across several evaluations, it will only be
activated once. It will not be activated again until it first changes to false for at least one
evaluation and then back to true again.
Within a single Control, all of the conditions must be true in order to activate the control.
In other words, all of the conditions are ANDed together. If you want more complex
conditions or conditions that are connected by OR, you may use the Other Condition
parameter. This provides additional flexibility for more advanced users to specify any
valid conditions.
Costs dialog
D ESCRIPTION
The Costs dialog box defines cost rates for calculating the total cost of a piece of equip-
ment or operator accrued during the simulation run. This dialog box is not applicable if
the module’s Statistics option has not been selected.
R EMARKS
For a description of the statistics reported for each type of module, refer to Chapter 4,
“Statistics.”
Loss dialog
D ESCRIPTION
The Loss dialog box allows you to specify the amount of product that is lost (waste)
during device operation. This lost product will show up in the production statistics and the
yield statistics. Loss can be specified in two different categories. Event-Based Loss only
occurs when a specific event occurs. Production-Based Loss occurs whenever the device
is producing product.