10.29 IntervalRange

The IntervalRange is a structure used to define a range of timing intervals.

The IntervalRange is formally defined in Table 182.

Table 182 – IntervalRange structure
Name Type Description
IntervalRangeStructureSubtype of Structure defined in OPC 10000-5

Min

0:UInt32The minimum interval (in units).

Max

0:UInt32

The maximum interval (in units).

For linear ranges: Max = Min + N * Increment

For exponential ranges: Max = Min * Multiplier

Where N is an unsigned integer.

Increment

0:UInt16

The increment from minimum to maximum.

An Increment value greater than or equal to 1 indicates a linear IntervalRange; in this case, Multiplier shall be set to 1.

0 indicates no increment.

Multiplier

0:UInt16

The multiplier that can be applied.

Multiplier shall be greater than or equal to 1.

A value of 2 or greater indicates an exponential IntervalRange; in this case, Increment shall be set to 0.

1 indicates no multiplier.

Unit

3:FxTimeUnitsEnumDefines the units of Min, Max, and Increment.

IntervalRange allows specifying

linear ranges:[Min, Min + Increment, Min + 2 * Increment, Min + 3 * Increment… Max]
exponential ranges:[Min, Min * Multiplier, Min * Multiplier2, Min * Multiplier3, …, Max]
fixed range: if Min is equal to Max.

For example, an IntervalRange with Min=2, Max=16, Increment=2 and Unit=milliseconds result in the following linear range: [2 ms, 4 ms, 6 ms, 8 ms, 10 ms, 12 ms, 14 ms, 16 ms]. An IntervalRange with Min=125, Max=1000, Multiplier=2 and Unit=microseconds result in the following exponential range: [125 µs, 250 µs, 500 µs, 1000 µs].

A null IntervalRange is indicated by setting Min and Max to 0.

The IntervalRange representation in the AddressSpace is formally defined in Table 183.

Table 183 – IntervalRange definition
Attribute Value
BrowseName3:IntervalRange
IsAbstractFalse
References NodeClass BrowseName DataType TypeDefinition Other
Subtype of the 0:Structure defined in OPC 10000-5
ConformanceUnits
UAFX AutomationComponent Base
UAFX FunctionalEntity Base