Express Interface Information about the OPC Xi Specification and OPC Xi Products
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IWrite Contract

This interface is composed of methods used to write/update data, alarms, and events and their histories.

 

Methods

AcknowledgeAlarms

This method is used to acknowledge one or more alarms.
Heritage: This method is adapted from the AcknowledgeEventNotification service defined by the ISO 9506 Manufacturing Messaging Specification (MMS).  

Passthrough

This method allows the client to send a message to the server that the server delivers unmodified to the intended recipient.  

WriteData

This method is used to write the values of one or more data objects in a list.
Heritage: The method corresponds to the ISO 9506 Manufacturing Messaging Specification (MMS) Write service.
 

WriteJournalData

This method is used to modify historical data values. The modification type parameter indicates the type of modification to perform.
Heritage: This method is adapted from the WriteJournal service defined by the ISO 9506 Manufacturing Messaging Specification (MMS).  

WriteJournalEvents

This method is used to modify historical alarms and/or events. The modification type parameter indicates the type of modification to perform.
Heritage: This method is adapted from the WriteJournal service defined by the ISO 9506 Manufacturing Messaging Specification (MMS).  

 

 

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