Configure Frequency Output Scaling Method - Emerson Micro Motion 2700 Configuration And Use Manual

6.3.3

Configure Frequency Output Scaling Method

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ProLink II
ProLink III
Field Communicator Configure > Manual Setup > Inputs/Outputs > Frequency Output > FO Scaling
Overview
Frequency Output Scaling Method defines the relationship between output pulse and flow
units. Set Frequency Output Scaling Method as required by your frequency receiving device.
Procedure
1.
2.
Calculate frequency from flow rate
The Frequency=Flow option is used to customize the frequency output for your application
when you do not know appropriate values for Units/Pulse or Pulses/Unit.
If you specify Frequency=Flow, you must provide values for Rate Factor and Frequency Factor:
Rate Factor
Frequency
Factor
Configuration and Use Manual
OFF-LINE MAINT > OFF-LINE CONFG > IO > CH B > SET FO > FO SCALE
ProLink > Configuration > Frequency/Discrete Output > Frequency > Scaling Method
Device Tools > Configuration > I/O > Outputs > Frequency Output
Set Frequency Output Scaling Method.
Option
Frequency=Flow (default)
Pulses/Unit
Units/Pulse
Set additional required parameters.
• If you set Frequency Output Scaling Method to Frequency=Flow, set Rate Factor and
Frequency Factor.
• If you set Frequency Output Scaling Method to Pulses/Unit, define the number of pulses
that will represent one flow unit.
• If you set Frequency Output Scaling Method to Units/Pulse, define the number of units
that each pulse will indicate.
The maximum flow rate that you want the frequency output to report.
Above this rate, the transmitter will report A110: Frequency Output Saturated.
A value calculated as follows:
FrequencyFactor =
where:
T Factor to convert selected time base to seconds
Integrate the meter with the control system
Description
Frequency calculated from flow rate
A user-specified number of pulses represents one flow unit
A pulse represents a user-specified number of flow units
RateFactor
x N
T
111