[RQ6.5] To reduce the number of variations and to alleviate validation testing, the following restrictions apply to instances of SafetyProviderType and SafetyConsumerType (or instances of DataTypes derived from SafetyProviderType or SafetyConsumerType):
The references shown in Figure 4 originating at SafetyProviderType or SafetyConsumerType and below shall be of ReferenceType HasComponent (and shall not be derived from ReferenceType HasComponent) for Object References or ReferenceType HasProperty (and shall not be derived from ReferenceType HasProperty) for Property References.
As BrowseNames (i.e. name and Namespace) are used to find Methods, the names of Objects and Properties shall be locally unique.
The DataType of both Properties and MethodArguments shall be used as specified, and no derived DataTypes shall be used (exception: OutSafetyData and OutNonSafetyData).
In IEC 62541, the order of Method arguments is relevant.
See Table 4 for the definition of the SafetyObjectsType.
Table 4 – SafetyObjectsType definition
|
Attribute |
Value |
||||
|
BrowseName |
SafetyObjectsType |
||||
|
IsAbstract |
True |
||||
|
References |
Node class |
BrowseName |
DataType |
TypeDefinition |
Modelling rule |
|
Subtype of BaseObjectType |
|||||
|
Conformance units |
|||||
|
SafetySupport |
|||||
See Table 5 for the definition of the SafetyProviderType.
Table 5 – SafetyProviderType definition
|
Attribute |
Value |
||||
|
BrowseName |
SafetyProviderType |
||||
|
IsAbstract |
False |
||||
|
References |
Node class |
BrowseName |
DataType |
TypeDefinition |
Modelling rule |
|
Subtype of SafetyObjectsType |
|||||
|
HasComponent |
Method |
ReadSafetyData |
|
|
Optional |
|
HasComponent |
Method |
ReadSafetyDiagnostics |
|
|
Optional |
|
HasComponent |
Object |
SafetyPDUs |
|
SafetyPDUsType |
Optional |
|
HasComponent |
Object |
Parameters |
|
SafetyProviderParametersType |
Mandatory |
|
Conformance units |
|||||
|
SafetyProviderParameters |
|||||
[RQ6.6] Instances of SafetyProviderType shall use non-abstract DataTypes for the arguments OutSafetyData and OutNonSafetyData.
See Table 6 for the definition of the SafetyConsumerType.
Table 6 – SafetyConsumerType definition
|
Attribute |
Value |
||||
|
BrowseName |
SafetyConsumerType |
||||
|
IsAbstract |
False |
||||
|
References |
Node class |
BrowseName |
DataType |
TypeDefinition |
Modelling rule |
|
Subtype of SafetyObjectsType |
|||||
|
HasComponent |
Object |
SafetyPDUs |
|
SafetyPDUsType |
Optional |
|
HasComponent |
Object |
Parameters |
|
SafetyConsumerParametersType |
Mandatory |
|
Conformance units |
|||||
|
SafetyConsumerParameters |
|||||