Rockwell Automation 1441-DYN25-Z Dynamix 2500 Data Collector - Manual (Page 84)

84 Rockwell Automation Publication 1441-UM001B-EN-P - September 2012
Chapter 3 Setting Up Measurements
• Use a measurement with Order normalization checked in the collection
specification. The machine speed from an internal or external tachometer
will be used for the machine speed. If the Order normalization checkbox is
not checked, the Dynamix 2500 data collector will use a fixed Fmax value
and will not calculate the Fmax based on the current speed of the machine.
The Emonitor software orders all the measurements in the route so that the
dependent machine speed measurement is collected first. This way, the route is
set up for the most accurate machine speed entry, and the measurements refer to
the correct machine speed. The band alarms and frequency labels adjust to
changes in the machine’s speed.
To set up the Speed Reference Frequency for the Dynamix 2500 data collector,
double-click in the Definition column in the Speed Reference row in the
Frequency Item pane. The Speed Reference Frequency dialog box appears.
There are three ways to obtain a speed references:
• You can enter a constant for the speed.
• You can use the value in the Machine Speed column for a location on an
item in the Hierarchy Tree.
• You can use the value from a process measurement as the speed.
Press F1 to find out more information about each option in the Speed Reference
Frequency dialog box.
TIP The Orders normalization checkbox does not produce
Orders Tracking measurements when used with speed
references.
Current spectrum measurement and Extract from
current spectrum measurement are not supported in
the Dynamix 2500 data collector 2500.