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36 Micro Motion
®
Model 2400S Transmitters for PROFIBUS-DP
Using the Transmitter
To use the I&M functions:
1. Read the data from the transmitter:
• Using a PROFIBUS host with the EDD, connect to the transmitter as a Specialist. See
Figure C-12.
• Using PROFIBUS bus parameters, use the I&M Functions block (see Table D-9). You
must read the entire 64-byte dataset.
2. If desired, log onto the PROFIBUS web site and enter the Manufacturer ID code retrieved
from the transmitter.
7.3 Recording process variables
Micro Motion suggests that you make a record of the process variables listed below, under normal
operating conditions. This will help you recognize when the process variables are unusually high or
low, and may help in fine-tuning transmitter configuration.
Record the following process variables:
• Flow rate
• Density
•Temperature
• Tube frequency
• Pickoff voltage
•Drive gain
To view these values, see Section 7.4. For information on using this information in troubleshooting,
see Section 11.13.
7.4 Viewing process variables
Process variables include measurements such as mass flow rate, volume flow rate, mass total, volume
total, temperature, and density.
You can view process variables with the display (if your transmitter has a display), ProLink II, or a
PROFIBUS host.
Note: If the petroleum measurement application is enabled, two of the API process variables are
averages: Batch Weighted Average Density and Batch Weighted Average Temperature. For both of
these, the averages are calculated for the current totalizer period, i.e., since the last reset of the API
volume totalizer.
7.4.1 With the display
By default, the display shows the mass flow rate, mass total, volume flow rate, volume total,
temperature, density, and drive gain. If desired, you can configure the display to show other process
variables. See Section 8.9.3.
The LCD panel reports the abbreviated name of the process variable (e.g.,
DENS for density), the
current value of that process variable, and the associated unit of measure (e.g.,
G/CM3). See
Appendix E for information on the codes and abbreviations used for display variables.