The lifetime model provides information about the lifetime, related limits and semantic of the lifetime of things like tools, material or machines.

Table 106illustrates the model with two examples, showing the information that can be provided with the model defined in this chapter. The Valueof the LifetimeVariableprovides the current value. The EngineeringUnits Propertyand the relation of the Indicationto a classification ObjectTypeprovide the semantic. The StartValueand LimitValue Propertiesindicate the range of the Value.

Table 106– Lifetime examples

Node

CertificateValidity

PartsProduced

LifetimeVariable

200

553

               EngineeringUnits (M)

day

number of parts

               StartValue (M)

365

0

               WarningValues (O)

10

950

               LimitValue (M)

0

1000

               Indication (O)

TimeIndicationType

NumberOfPartsIndicationType

For the CertificateValidity example, the instance of the LifetimeVariableTypedefines the remaining validity of a certificate with a unit of days and a classification of TimeIndication. The Valuespecifies 200 days – the remaining validity of a certificate. The initial value is 365 days with a warning level of 10 days. The certificate is invalid when the Valueis zero.

For the PartsProduced example, the instance of the LifetimeVariableTypedefines the produced parts in the lifetime with a classification of NumberOfPartsIndication. The Valuespecifies 553 parts. The starting value is 0 parts and it is possible to produce up to 1000 parts with a warning indication if the number reaches 950.