Configuration Guide User Manual

Micro-PWC CONFIGURATION GUIDE
236 Historical Database
Data Type When manual data points are configured, the user can define a data type for
the manually entered data. Available data types include:
• Numerical
• Alphanumerical (32 characters)
• Alphanumerical (64 characters)
• Alphanumerical (128 characters)
• Alphanumerical (256 characters)
• Alphanumerical (512 characters)
Event Bit Event bits are a set of 4,096 group wide event flags which can be set to indi-
cate that an event has occurred. Event bits can be addressed by name (refer
to Section 2.8.2, Event Bit Configuration, for details on event bit name assign-
ment) or number. Assignment of an event bit in the historical database allows
the data to be collected when the condition indicated by the event bit occurs.
Historical
Database
Tagname
Tagname used to identify the point in the historical database. It can be up to 37
characters in length, cannot contain spaces, and must be unique on the net-
work. If no historical database tagname is configured, it will default to the tag-
name of the associated server database point.
Storage Rate Defines the number of collections which will occur before a value is actually
stored in the historical database; it is a multiple of the collection rate, i.e., if a
point has a collection rate of one second and a storage rate of 10, then only
data for every tenth collection would actually be stored in the historical data-
base. The default storage rate is 1.