Rockwell Automation FactoryTalk Metrics User Guide - Manual (Page 75)

Collecting Performance Data Chapter 3
Select this option if you want to use machine state to
determine Monitored Availability.
When machine states are defined, the (Monitored)
Availability of each machine state is set. If machine states are
configured for the current activity area, then at any point in
time the activity area will be in one and only one machine
state, and the Monitored Availability of that machine state
(either available or unavailable) will be used.
For more information, see "Configure and Use Machine States
(page 118)".
• The Plant Model Activity Area monitors an Unscheduled
Data Point to determine availability.
Select this option if you want to improve the accuracy of the
OEE rating.
For example, if you base the monitored availability on the data
point that contains the running bit of an upstream unit, the
OEE of the current unit will not be negatively affected when it
is waiting for parts (the upstream unit is not running).
You can either only select a data point or first select a data
point as the availability event trigger, and then set the actual
availability value using a FactoryTalk Transaction Manager
expression.
Proceed as follows:
1. Click Select.
Rockwell Automation Publication PLTMT-UM001M-EN-P-June 2014 75