BACnet_TrendLogMultiple

A Trend Log Multiple object monitors one or more properties of one or more referenced objects, either in the same device as the Trend Log Multiple object or in an external device. When predefined conditions are met, the object saves ("logs") the value of the properties and a timestamp into an internal buffer for subsequent retrieval. The data may be logged periodically or when "triggered" by a write to the Trigger property.

Each Trend Log Multiple object maintains an internal, optionally fixed-size, buffer in its Log_Buffer property. This buffer fills or grows as log records are added. If the buffer becomes full, the least recent log record is overwritten when a new log record is added, or collection may be set to stop.

Datapoint Type Name

BACnet_TrendLogMultiple

(Object/)Datapoint Type Structure

Faceplate

For general information on faceplates see Symbols and Faceplates - General or the external Standard Object Library documentation (<wincc_oa_path>\Stdlib_<version>\help).