Frequency Output Setup Overview
Frequency output is a common signal output method in industrial flowmeters, used to convert flow signals into frequency signals for easy acquisition by PLC or DCS systems. This article uses Endress+Hauser's Promag 50, Prowirl 73, Promass 80, and Prosonic 92 as examples to introduce the frequency output setup steps.
Correctly configuring the frequency output ensures stable signal transmission and avoids measurement errors. The following content is intended for reference by engineering technicians and procurement personnel.
Frequency Output Setup Steps
General Setup Procedure
The menu structures of different instrument models vary slightly, but the basic setup logic is similar. Please follow the steps below:
- Enter the instrument main menu and select "Output" or "Communication" settings.
- Find the "Frequency Output" option and enable this function.
- Set the range of the frequency output, including the flow values corresponding to the minimum frequency and maximum frequency.
- Select the signal mode of the frequency output (such as pulse or frequency).
- Save the settings and exit the menu.
Specific Operations for Each Model
- Promag 50: In the "Output" menu, select "Frequency Output", set the frequency range (e.g., 0-1000 Hz) and the corresponding flow.
- Prowirl 73: Enter "Setup" -> "Output", select "Frequency Output", configure the pulse weight or frequency range.
- Promass 80: In the "Output" menu, select "Frequency Output", set the frequency upper and lower limits, and specify the flow unit.
- Prosonic 92: Through "Main Menu" -> "Output", select "Frequency Output", set the frequency range and flow correspondence.
Parameter Setup Reference
The following are common parameters and recommended values for frequency output, for reference during commissioning:
| Parameter | Description | Recommended Value |
|---|---|---|
| Frequency Range | Minimum and maximum values of the output frequency | 0-1000 Hz |
| Flow Correspondence | Flow values corresponding to the minimum and maximum frequencies | Set according to range |
| Signal Mode | Frequency output or pulse output | Frequency |
| Output Direction | Forward or reverse flow | Forward |
Precautions and Common Issues
Precautions
- Ensure that the frequency output matches the input specifications of the receiving device (such as a PLC).
- Avoid conflicts between the frequency output and other output signals (such as 4-20mA).
- After setup is complete, perform a simulation test to verify signal accuracy.
Common Issues
- No frequency output: Check whether the wiring is correct and whether the output function is enabled.
- Unstable frequency: Check whether the flow is stable or whether there is electromagnetic interference.
- Frequency value deviation: Recalibrate the frequency range or check the flowmeter parameters.
For more detailed guidance, please refer to the operation manual of each model or contact technical support.