Equation with override points are similar to equation points. They use the expression you specify in the point_expression field to update the point's value. The expression may contain one or more device or derived Point IDs, along with constant values, arithmetic operations, logical operations, bit operations or alarm functions.
In addition, the value of an equation with override point may be updated by CIMPLICITY software applications, custom applications using the Point Management API, or through standard Setpoint functions. The changed value remains in effect until one of the source points for the expression changes and the expression is recalculated.
A Reset condition occurs when the reset point is updated. This will cause the equation with override point to be reset to the current value of its expression.
Specifications
The equation with override point is a derived point with the calculation_type set to 8.
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Derived point file (DERIVED_POINT). |
