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Reference Manual
00809-0100-4832, Rev AA
October 2004
Rosemount 3095FC
3-16
Analog Input (AI)
Configuration
Analog Inputs are analog signals generated by measurement devices, such
as pressure and temperature transmitters, including RTD probes.
The following tabs are available as part of the AI configuration:
• AI General tab
• AI Advanced tab
• AI Calibration tab (see “Analog Input (AI) Calibration” on page 4-3)
• AI Alarms tab
AI General Tab
The AI General Table sets the basic parameters for the Analog Input point.
Use the following steps to configure the AI General Tab.
See Figure 3-12
1. Select Device > I/O > AI Points > General Tab
2. Select the Analog Input.
3. Enter a 10-character Tag for identification of this Point Number.
4. Enter the Value and Units.
5. Select the Scanning option.
• When Scanning is set to Enabled, Value automatically displays
the last Analog Input scan in engineering units.
• When Scanning is set to Disabled (manual mode), the value is no
longer updated by the 3095FC. If Scanning is set to Disabled,
enter a value to override the input. If Alarming is Enabled, an
alarm generates when Scanning is set to Disabled.
6. Set the Alarming option. The Active Alarms field indicates any alarms
that are active for this point. For example, when Alarming is Enabled,
the limit alarms (such as Low Alarm and Rate Alarm) that are active
appear. Even if Alarming is Disabled, the Point Fail (hardware reports
a malfunction) alarm and Manual (Scanning Disabled) indicators can
still appear.
7. Enter the Scan Period as the amount of time between updates of the
filter value. All Analog Inputs are updated based on their individual
Scan Periods. The default value is 1 second. The minimum Scan
Period allowed is 50 msec.
8. Enter the Low Reading EU (engineering unit) corresponding to 0%
input. Enter the High Reading EU corresponding to 100% input.
For example: If a temperature transmitter is connected to the Analog
Input with a range of -40 °F to 212 °F, the Low Reading EU would be
set to -40 and the High Reading EU would be set to 212.
9. To complete point configuration click Apply.
10. Use Device > Flags > Flash Memory Save Configuration to save the
configuration to the Flash Memory in case a Cold Start must be
performed.