Operating Instructions

Glossary

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SCADA

Supervisory Control and Data Acquisition. Typically, the software application that resides in a computer,

supervising a variety of controllers and handling data acquisition.

Synchronous mode

In this mode, the OPC Data Manager must wait for the “Write was Successful” signal from the

OPCServer after each COV write request. This prevents a backup of COV data and maintains optimal

performance.

shared point

Central data structure in the OPC Data Manager that establishes a connection between two OPC items.

sibling

One OPC Data Manager in a pair that has been set up for redundancy. An identical copy that can support

all functionality.

uni-directional

Information can be transmitted in only one direction—from the Master OPC item to the Slave OPC item.

Warm Backup

Used in redundancy. Backup OPC Data Manager that creates groups in each OPC server, but does not

activate any of its groups until the primary OPC Data Manager fails.