PySide6.QtOpcUa.QOpcUaReadItem

class QOpcUaReadItem

This class stores the options for a read operation. More…

Synopsis

Methods

Note

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Detailed Description

A read operation on an OPC UA server returns the entire value or a certain index range of the value of an attribute of a node on the server. This class contains the necessary information for the backend to make a read request to the server.

One or multiple objects of this class make up the request of a readNodeAttributes() operation.

__init__()

Default constructs a read item with no parameters set.

__init__(other)
Parameters:

other – QOpcUaReadItem

Constructs a read item from other.

__init__(nodeId[, attr=QOpcUa.NodeAttribute.Value[, indexRange=""]])
Parameters:

Constructs a read item for the index range indexRange of the attribute attr of node nodeId.

attribute()
Return type:

NodeAttribute

Returns the node attribute id.

See also

setAttribute()

indexRange()
Return type:

str

Returns the index range.

See also

setIndexRange()

nodeId()
Return type:

str

Returns the node id.

See also

setNodeId()

__ne__(rhs)
Parameters:

rhs – QOpcUaReadItem

Return type:

bool

Returns true if lhs is not equal to rhs; otherwise returns false.

Two read items are considered not equal if their nodeId, attribute or indexRange are not equal.

setAttribute(attribute)
Parameters:

attribute – NodeAttribute

Sets the node attribute id to attribute.

See also

attribute()

setIndexRange(indexRange)
Parameters:

indexRange – str

Sets the index range to indexRange.

See also

indexRange()

setNodeId(nodeId)
Parameters:

nodeId – str

Sets the node id to nodeId.

See also

nodeId()