Name EventType EventType (archived message)
OPC_SIMPLE_EVENT 0x01 0x81
OPC_CONDITION_EVENT 0x04 0x84
OPC_TRACKING_EVENT 0x02 0x82
OPC_HAE_HISTORICAL_EVENTFLAG 0x80
Example 1
The archived messages and events of the last 30 minutes are output in "read" mode using the
following source filter. The oldest message per OS server is output first. The low limit value
will also be returned:
OPCHAEServer hmode=read htStartTime=NOW-30M bBounds=TRUE
Example 2
The archived events of September 1, 2006 from 10.00 a.m. to 12.00 a.m. are output in "read"
mode using the following source filter. The latest message per OS server is output first. The
limit values of this time range will also be returned:
OPCHAEServer hMode=read htStartTime=2006-09-01T12:00:00.000Z
htEndTime=2006-09-01T10:00:00.000Z bBounds=TRUE
Example 3
The archived messages and events of the last 30 minutes are output in "advise" mode using
the following source filter. After reading all archived messages, the newly generated messages
are transferred as with an active subscription:
OPCHAEServer hmode=advise htStartTime=NOW-30M
6.7 OLE DB
6.7.1 Overview
Overview
You will find information about the following topics in the section below:
● Basics of OLE DB
● Establishing the connection to the database
● Access to the OLE DB provider
● Representation of the process value archive
● Querying process value archives
OpenPCS 7 interface
6.7 OLE DB
OpenPCS 7
80 Function Manual, 05/2012, A5E02780178-02
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