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Chapter 3
Configurable Flowmeter Module Features and Operational Modes
34
Highest Allowed Frequency
Use Highest Allowed Frequency to set the trigger point for Frequency. In other
words, set this value so that when the input reaches it, the outputs are
energized. This value is also used for the Overspeed Alarm.
Acceleration Alarm Value
Use Acceleration Alarm to set the trigger point for Acceleration. In other
words, set this value so that when the input reaches it, the outputs are
energized. This value is also used for the Acceleration Alarm.
Frequency Average
With Frequency Average, the module divides meter counts by a user-defined
sample interval (up to 2 seconds) to determine the Frequency Average.
Acceleration
Use Acceleration to determine an acceleration value over a user-defined
number of samples.
Alarms in High Resolution Frequency Mode
High Resolution Frequency mode offers these alarms:
•
Overrange Alarm
•
Overspeed Alarm
•
Acceleration Alarm
You must enable each alarm. When any of the alarms occur, it is latched and
remains on until the user resets the alarm.
Sample Configuration for High Resolution Frequency Mode
To see a sample configuration for a 1756-CFM module using High Resolution
Frequency mode, including the use of all the features mentioned in the
previous section, see
Rockwell Automation Publication 1756-UM010C-EN-P - June 2021
page
88.
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