Selected Functions
5-16
5.8 Scaling Constants
With
machine configuration #3, a single valve controls flow and pressure. At
different intervals in the profile, control is switched between flow and
pressure; because of the valve design, there is more gain during pressure
control mode than during flow control mode.
Constants are provided in the Download table to allow you to reduce a
pressure output. These constants are stored in (WY5)+V226 to (WY5)+V235.
There are three restrictions for using these constants:
•
Use only with machine configuration #3.
•
Use only in Injection, Pack-and-Hold, Plasticate profiles.
•
Use only on pressure outputs.
For example, if the injection pressure loop calculates an output value of
32000 and (WY5)+V228 = 10, the actual output equals 3200.
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