Datasheet

Fig IORack bit set for a rack class
Attributes
Description
Attribute of type pwrs:Type-$String80. The content is displayed as description in the navigator.
Process
Attribute of type pwrs:Type-$Uint32. States which process should handle the unit.
ThreadObject
Attribute of type pwrs:Type-$Objid. States which thread in the plcprocess should handle the uing.
Fig Standard attributes
Method objects
The method objects are used to identify the methods of the class. The methods consist of c-
functions that are registered in the c-code with a name, a string that consists of class name and
method name, e.g. “Ssab_AIuP-IoCardInit”. The name is also stored in a method object in the class
description, and makes is possible for the I/O framework to find the correct c-function for the class.
Below the $ClassDef object, a $RtMethod object is placed with the name IoMethods. Below this
one $Method object is placed for each method that is to be defined for the class. In the attribute
MethodName the name of the method is stated.