Echelon OpenLNS - Manual (Page 655)

OpenLNS Programmer's Reference 618
TypeSpec
Summary Contains an object that defines the type used by the network
variable. This includes the name of the network variable
type, and the scope and program ID of the resource file that
contains the definition of the type. OpenLNS uses this
information to identify the type a network variable should
use. In some cases, you can write to the properties of this
object to change the network variable’s type .
If the ChangeableTypeSupport property of the network
variable is set to lcaNvChangeableTypeSdOnly (1) or
lcaNvChangeableTypeSCPT (2), you can modify the
network variable’s type by writing new values to the
properties of the TypeSpec object. For more information on
this, see the TypeSpec object.
If the ChangeableTypeSupport property is set to
lcaNvChangeableTypeNone (0), then you cannot modify
the network variable’s type. If you attempt to write to this
property, the LCA#:157 lcaErrTypeNotChangeable
exception will be thrown.
The TypeSpec object contained within this property is not
passed by reference. If you modify the values assigned to the
properties of a local TypeSpec object, you must then explicitly
assign the modified TypeSpec object back to the TypeSpec
property of the NetworkVariable for the changes to take
effect. See the TypeSpec object for more information.
Availability Local, full, and lightweight clients.
Syntax typeSpecObject = networkVariable.TypeSpec
Element Description
typeSpecObject The TypeSpec object returned by the
property.
networkVariable The NetworkVariable object to be
acted upon.
Data Type TypeSpec object.
Read/Write Read/write.
Added to API LNS Release 3.20.
NetworkVariables
A NetworkVariables object is a collection of NetworkVariable objects. You can use the Item
property, the ItemByProgrammaticName method, or the ItemByIndex method to retrieve a
network variable from the collection. The following table summarizes the NetworkVariables
object.
Description A collection of NetworkVariable objects.
Added to API Prior to LNS Release 3.0.