GPS-X Technical Reference

429 Miscellaneous
The smoothing function will only be applied to a user-specified percentage change (smooth at
flow changes larger than). This allows the user the flexibility of smoothing only larger changes
in a pump flow rate. The smoothing function will be applied to all pump flows in a layout
including underflows, control splitters, etc. See Figure 15-13 for an illustration of how the
smoothing function affects the pumped flow.
Figure 15-13 - Smoothing Function
LARGE MODELS
Although GPS-X allows the user to build very large and complex layouts, there are some
restrictions. First, the simulation language used, ACSL, currently has a limit on the number of
discrete blocks of code that can be specified. What this means to the user is that the number of
automatic controllers for a given layout cannot exceed 25. Since a number of objects have built-in
controllers (e.g., settler has a controller for both the pumped flow and underflow), the user can
quickly use all the allowable discrete code blocks. To circumvent this problem, the user can select
either the Big option, which combines all the automatic controller code into one discrete block, or
the Big+ option, which disables all controllers. In selecting the Big option, the user can no longer
specify the sampling time for each individual controller loop. One sampling interval will override
the rest. This sampling interval (controller sampling time) is found under General Data >
System > Parameters > Miscellaneous.
GPS-X Technical Reference