36 XFC G4 2103335 Rev AB
ID Recognized: The ID has been recognized but is waiting for sync.
Ethernet Protocol: Displayed when the Totalflow/TCP port is active.
Back Flow Condition: Visible only when DP variable is displayed
Zero Flow Condition: Visible only when the flow rate is displayed
Hold: Displayed when PCCU32 has entered hold
Alarm Condition: Need to view alarm. Compare application limits to the current values to determine where
the alarm condition is present.
A to D Failure: Displayed if the A to D converter’s absolute differential pressure, absolute static pressure,
or temperature readings exceed the maximum counts or are less than the minimum counts
Displayed when Valve Control option is installed and no other valve control symbols are valid.
Displayed when Valve Control option is installed. Process value (PV) is within the user set dead band. No
control action required.
Displayed when Valve Control option is installed. Valve is in full open position.
Displayed when Valve Control option is installed. Valve is in full closed position.
Displayed when Valve Control option is installed. Valve is opening (open signal is being sent to valve
actuator).
Displayed when Valve Control option is installed. Valve is closing (close signal is being sent to valve
actuator).
Displayed when Valve Control option is installed. Valve controller override conditions met (DP/SP override
set point or low battery).
Displayed when Valve Control option is installed. Local lock-out is initiated.
3.10 XFCG4 Application Licensing
The fourth generation (G4) flow computers offers unrivaled power and flexibility. The G4 flow computer can support far more
applications than the third generation (G3) devices. Various applications require that Totalflow pay a royalty to third party
vendors. As such, Totalflow has developed a credit system for handling application loads beyond what would be required for a
typical G3 meter run. Application credits are required to enable many of the applications. From the factory, the G4 unit has four
general credits installed. Several system configurations are possible with these four general credits:
— AGA-3 with Valve Control and Trending (uses 3 general credits)
— Two AGA-3 (or AGA-7) tubes with Trending (uses 3 general credits)
— AGA-3 with Valve Control and Plunger Lift (uses 3 general credits)
Applications have been divided into categories: Standard, General, IEC, CO2 and HCDP (hydrocarbon dew point). Other
application categories may be created in the future.
Standard applications typically support general applications as well as the basic operation of the flow computer. Standard
applications do not require any credits to be instantiated.
Standard applications include:
— System Application
— Communications
— I/O Subsystem
— Therms Master
— Therms Slave
— Analysis Trend System
— LevelMaster
— Operations
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