Rockwell Automation FactoryTalk Metrics User Guide - Manual (Page 98)

Chapter 3 Collecting Performance Data
Use this event trigger type: To:
Monitored Value Monitor any change of a value in the control system.
For this event trigger type, you need to specify a control system value as the trigger data
point for this event trigger type. The trigger data point can be either a numeric or string
data type. Because this event is triggered by a change in the value reported by the control
system only values that report their data in an unscheduled manner may be selected as the
trigger data point.
Use the trigger to track any change in the monitored value and accumulate the amount of
time that a specific value is reported from the control system.
This event trigger type is very useful for tracking things such as machine states that do not
have a specific On/Off value.
Monitored Formula Bit Low to High
Transition Monitor a result of a formula in the control system.
Formulas let you perform advanced calculations that can be based on operations against
multiple data points.
See also: Monitored Bit Low to High Transition
Monitored Formula Bit High to Low
Transition Monitor a result of a formula in the control system.
Formulas let you perform advanced calculations that can be based on operations against
multiple data points.
See also: Monitored Bit High to Low Transition
Monitored Periodic Value Periodically collect a control system value.
For this event trigger type, you do not select any control system value as a Trigger data
point.
This event trigger type is especially useful for collecting counter values to be associated
with Performance Parameter data. It is used by the Activity Area Part Count - Point and
Part Count Formula Point <Data Point Name> Events. It causes the control system value
selected for the event value data point to be collected from the control system every five
seconds.
The event trigger type does not cause new event data records to be written to the
database. The event data will only be written to the database according to the Data
Summarization type selected for the event.
None Periodically collect a control system value.
For this event trigger type, you do not select any control system value as a Trigger data
point.
This event trigger type is especially useful for collecting physical parameter data over the
duration of a period of data collection. It causes the control system value selected for the
event value data point to be collected and written to the database every 5 seconds for the
duration of data collection.
Important: This event trigger type will generate an extremely large amount of data when
compared to other event trigger types.
98 Rockwell Automation Publication PLTMT-UM001M-EN-P-June 2014