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CVBpy 14.0
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CVBpy 14.0
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Represents an OPCUA variable node that contains a floating-point number value. More...
Inherits VariableNode.
Public Member Functions | |
| cvb.opcua.FloatNode | create (int namespace_index, str name, cvb.opcua.NodeID parent_node_id, float value) |
| Creates an OPCUA variable with the specified parameter, data type, and its floating-point value. More... | |
| None | set_value (self, float value) |
| Sets value of this node. More... | |
| float | value (self) |
| Returns value of this node. More... | |
 Public Member Functions inherited from VariableNode | |
| None | deregister_callback (self, cvb.EventCookie event_cookie) |
| Deregisters a callback. More... | |
| cvb.EventCookie | register_read_callback (self, Callable[[], None] callback) |
| Registers a callback for the read operations on this node. More... | |
| cvb.EventCookie | register_write_callback (self, Callable[[], None] callback) |
| Registers a callback for the write operations on this node. More... | |
| Public Member Functions inherited from BaseNode | |
| List[cvb.opcua.NodeID] | browse (self, cvb.opcua.BrowseFilter filter_options) |
| Enumerates the child nodes present in the OPCUA server. More... | |
| Union[int, float, str] | get_attribute (self, int attribute_id) |
| Gets specific information about this node. More... | |
| cvb.opcua.NodeID | node_id (self) |
| Gets the OPCUA node ID of this node. More... | |
| None | set_attribute (self, int attribute_id, Union[int, float, str] value) |
| Sets specific information about this node. More... | |
Additional Inherited Members | |
| Properties inherited from VariableNode | |
| datatype = property | |
| int: Gets the data type of this node (see cvb.opcua.DataType). | |
| Properties inherited from BaseNode | |
| access = property | |
| int: Gets access rights to this node (see cvb.opcua.Access). | |
| browse_name = property | |
| str: Gets the browse name of this node. | |
| connection_status = property | |
| int: Gets connection status of this node (see cvb.opcua.ConnectionStatus). | |
| description = property | |
| str: Gets description of this node. | |
| display_name = property | |
| str: Gets the human-readable name of this node. | |
| node_class = property | |
| int: Gets OPCUA node class of this node (see cvb.opcua.NodeClass). | |
Represents an OPCUA variable node that contains a floating-point number value.
It provides an interface for storage and manipulation of floating-point numbers.
| cvb.opcua.FloatNode create | ( | int | namespace_index, |
| str | name, | ||
| cvb.opcua.NodeID | parent_node_id, | ||
| float | value | ||
| ) |
Creates an OPCUA variable with the specified parameter, data type, and its floating-point value.
You must add this node to a server before most operations are possible. The OPCUA BaseNode which is created by this function has the default type definition, cvb.opcua.Namespace0NodeID.BaseVariableType (see cvb.opcua.Namespace0NodeID). Further, the default reference type is cvb.opcua.ReferenceType.HasComponent (see cvb.opcua.ReferenceType). Callbacks can be registered once the node has been added by the cvb.opcua.Server.add_node method to a server by the cvb.opcua.VariableNode.register_write_callback method or the cvb.opcua.VariableNode.register_read_callback method call.
namespace_index : int Index of the namespace where the OPCUA node should belong to.
name : str String literal for non-localized, human-readable name of the OPCUA node.
parent_node_id : cvb.opcua.NodeID OPCUA node ID of the parent to which the OPCUA node to be created belongs.
value : float Name of the node.
cvb.opcua.FloatNode The specified object.
| None set_value | ( | self, | |
| float | value | ||
| ) |
Sets value of this node.
value : float New value.
| float value | ( | self | ) |
Returns value of this node.
float The value.