Product specifications

Property Transfer
478 3BDS011222-510 B
You can make a processed reading with a certain number of values back.
GET_HISTORY(OBJECT= ; ASPECT= ; PROPERTY= ;LOG= ; FROM= ;TO=
;Aggregate= ;COUNT= )
Another alternative you have is to decide how often the values are read.
GET_HISTORY(OBJECT= ; ASPECT= ; PROPERTY= ;LOG= ; FROM= ;TO=
;Aggregate= ;RESAMPLE= )
You can also give both, but then it is the value on COUNT that decides the sample
rate.
GET_HISTORY(OBJECT= ; ASPECT= ; PROPERTY= ;LOG= ; FROM= ;TO=
;Aggregate= ;RESAMPLE= ;COUNT= )
Property Transfer
Purpose
The Property Transfer function is mainly used to transfer data between OPC servers.
It can also be used as a calculation function, not only reading data from aspect
object properties but also entering these data into a suitable algorithm and delivering
the results to aspect object properties.
The data collection as well as the data delivery can be done from/to any public
aspect object property (including the aspect properties from aspects such as the
General Properties aspect).
Property Transfer Definition Aspect
The Property Transfer aspect is created on the destination object. The property
transfer aspect then specifies the data sources and the expression.
You can specify more than one transfer in the same aspect. For each transfer you can
set the destination Property (aspect Name and property Name), the source
Expression, and bad data replacement Substitution Value. You can also specify
Absolute Deadband and Relative Deadband. You can also use the enabled
property of the aspect to disable all transfers in the aspect.
A Property Transfer aspect may contain a bad data substitution value. That is, a
value that is used if the source data can not be computed. If no substitution value has