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84 Model 2700 Transmitter with PROFIBUS-PA
Operation
Record the following process variables:
• Flow rate
• Density
•Temperature
• Tube frequency
• Pickoff voltage
•Drive gain
To view these values, refer to Section 5.4.
5.4 Viewing process variables
Process variables include measurements such as mass flow rate, volume flow rate, temperature, and
density. You can view process variables with the display (if your transmitter has a display),
ProLink II, a PROFIBUS configuration tool (e.g., Simatic PDM) using the EDD, or from a Class 2
PROFIBUS host using bus parameters.
5.4.1 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 4.16.5.
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 B for information on the codes and abbreviations used for display variables.
To view a process variable with the display:
• If Auto Scroll is enabled, wait until the desired process variable appears on the LCD panel.
• If Auto Scroll is not enabled,
Scroll until the name of the desired process variable either:
- Appears on the process variable line, or
- Begins to alternate with the units of measure
The precision of variables shown on the display is configurable. See Section 4.16.5. The display
precision affects only the value shown on the display, and does not affect the actual process value
stored in the transmitter.
Process variable values are displayed using either standard decimal notation or exponential notation:
• Values < 100,000,000 are displayed in decimal notation (e.g.,
1234567.8).
•Values ≥ 100,000,000 are displayed using exponential notation (e.g.,
1.000E08).
- If the value is less than the precision configured for that process variable, the value is
displayed as
0 (i.e., there is no exponential notation for fractional numbers).
- If the value is too large to be displayed with the configured precision, the displayed
precision is reduced (i.e., the decimal point is shifted to the right) as required so that the
value can be displayed.