Recording data on a Storage is performed as follows:

•After defining a table, data is stored according to its settings. If there is a variation in Tag's quality, data is also recorded

•Data is not stored only if its variation occurred on a time period smaller than the minimum configured time

As new values are obtained for variables, a record-checking algorithm interprets this sequence and decides whether each point is stored or not.

This record-checking, however, only occurs for analog fields. For text and digital fields, it is enough to have any value or quality variation to store them.

For each type of quantity stored, a set of tables is generated, one for analog Tags, another one for texts, and a third one for digital Tags. This way, each Storage can manage up to seven tables (backup), in case users specify that all three Tag types must be stored.

<TableName>_Fields
<TableName>
<TableName>_Text
<TableName>_Bit
<TableName>_Backup
<TableName>_Text_Backup
<TableName>_Dig_Backup