Emerson MMI-20019043 Manuel D’Utilisation

5.4.1

Configure Update Rate

Display

ProLink II

ProLink

 > Configuration > Device > Update Rate

ProLink III

Device Tools

 > Configuration > Process Measurement > Response > Update Rate

Field Communicator Configure > Manual Setup > Measurements > Update Rate

Update Rate

 controls the rate at which process data is polled and process variables are

calculated. Update Rate = Special produces faster and “noisier” response to changes in the
process. Do not use Special mode unless required by your application.

For systems with a standard core processor, Special mode can improve performance for applications
with entrained air or Empty-Full-Empty conditions. This does not apply to systems with an enhanced
core processor.

Before setting Update Rate to Special:

•

Check the effects of Special mode on specific process variables.

•

Contact Micro Motion.

1.

Set Update Rate as desired.

Normal

All process data is polled at the rate of 20 times per second (20 Hz).
All process variables are calculated at 20 Hz.
This option is appropriate for most applications.

Special

A single, user-specified process variable is polled at the rate of 100 times per sec-
ond (100 Hz). Other process data is polled at 6.25 Hz). Some process, diagnostic,
and calibration data is not polled.
All available process variables are calculated at 100 Hz.
Use this option only if required by your application.

If you change Update Rate, the settings for Flow Damping, Density Damping, and
Temperature Damping

 are automatically adjusted.

2.

If you set Update Rate to Special, select the process variable to be polled at 100 Hz.

Configure device options and preferences

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