Enhanced Liquid & Gas Flow Computer for CompactLogix®


ProSoft Technology’s MVI69E-AFC in-chassis flow computer solution allows you to combine the power and scalability of a CompactLogix® automation system with the functionality typically only seen in a stand-alone flow computers or dedicated measurement RTU’s. This provides you with the industry standard calculations, archiving, and reporting needed for custody transfer and allocation based measurement functions for Oil and Gas operations.

By combining automation and measurement functions into a single solution, this helps to reduce overall support and integration costs for Oil and Gas applications while also decreasing your overall capital spend. This simplified solution allows you to optimize your resources.

In addition, because our flow computer sits in a CompactLogix system, you can take advantage of Rockwell Automation’s distributed I/O capability, wide range of communications protocols, and ProSoft’s wireless radios to greatly reduce wiring to your transmitters and I/O devices.

Since the module operates as a co-processor for measurement related functions to the CompactLogix system, and as measurement requirements of the site grow, you can simply add an additional MVI69E-AFC module to increase your measurement capabilities to an individual site. A truly scalable automation and measurement solution.


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Características y Beneficios

  • Meter runs: The module can calculate up to 12 meter runs simultaneously with a maximum of 16 streams on a single meter run (64 streams maximum per module shared among all 12 meter runs). This flexibility provides a cost-effective, highly scalable solution for all your measurement applications.
  • Modbus capabilities: Remote configuration and diagnostics via Ethernet (Modbus TCP/IP) or Serial (Modbus) interfaces. Flexible serial port configurations allow for either two Modbus slave ports or one Modbus slave and one Modbus Master port. All data, including configuration, calculated results, and historical archives, are available using either the Modbus TCP/IP server or Modbus slave serial ports.
  • Customized Modbus Data Mapping: Remapping to a virtual slave enables data concentration, reducing bandwidth load on the communication system.
  • Auditability: Our configuration software provides the ability to download and view archives and events. Audit Scan captures process inputs and calculated results as "snapshots,” allowing verification of calculations. The Event Log records significant events and alarms. Hourly and daily archives are configurable historical records of user-selected data. The data can be viewed online, printed, or saved to a file in .txt or .csv format. Archive data can be exported to Flow-Cal .cfx format. Meter calibration and verification are stored on the module.
  • Meter proving: Allows for meter proving with 3 configurable prover types.
  • Security: Password protection schemes are available to control user access and log meter calibration and verification activities. A built-in web server allows for remote network diagnostics and monitoring.


The EAFC Manager is a free Windows 7-based configuration, reporting, and monitoring tool provided with all MVIxxE-AFC modules.Project configurations may be uploaded, downloaded, and saved to the PC under user-selectable file names.


General Specifications

  • The module is recognized by the processor as an Input/Output module.
  • The provided Add-On Instruction (AOI) files are used for data transfers between the module and processor, reducing configuration time.
  • Configuration is downloaded over Ethernet by way of the Modbus TCP/IP servers, or delivered by user-defined ladder.


Functional Specifications

The MVI69E-AFC operates as a powerful flow computer module, augmenting the operation of the CompactLogix® processor by providing a dedicated and accurate set of flow calculations.

  • Calculates flow rates, accumulated volumes, accumulated mass, and (for gas product) accumulated energy.
  • Calculation results are transferred to processor memory and may also be transferred to a SCADA host using Modbus serial or Modbus TCP/IP.
  • User-configurable, allowing each of the meter runs to be individually set up to meet the specific requirements of an application.



  • Supports data archiving and event logging.
  • Data archiving is available for each meter run, as two separately configurable files, one called “hourly” and the other called “daily”, whose records are intended to implement the Quantity Transaction Records (QTRs) required by applicable measurement standards. Under default configuration:
    • Records are written once each hour to the “hourly” file and once each day to the “daily” file, with additional records written to both files upon occurrence of an event that could affect measurement results (such as the change in value of a significant parameter).
    • Each record consists of 100 registers formatted with up to 50 data point values selected as being appropriate for the meter’s configuration (type, product, etc.) and compliant with QTR requirements.
    • Each file is formatted for a few of the most recent records to be kept in higher-speed local storage plus 1440 more records in larger-capacity, slower “extended” storage.
  • Logging feature provides storage of up to 2,000 events and separately 2000 alarms.


Configurable Options

  • User-selectable units for totalizers and flow rates on a per channel basis.
  • Roll-over value for resettable and non-resettable totalizers for every meter channel.
  • Process analog input units and ranges (pressure, temperature, differential pressure, density) from analog input modules and pulse inputs from pulse/frequency input modules in a CompactLogix chassis.
  • Fluid selection provides a choice of several liquid groups or gas measurement, using AGA, API, and/or ISO calculations.
  • Event log reports for all security-sensitive configuration data (for example, orifice diameter) are date- and time-stamped. This data can be saved to disk for importing into any spreadsheet or printed as a hard copy.


Modbus Interface

  • SCADA communication is provided by the Modbus TCP/IP server and Modbus slave serial ports.
  • Modbus table may be re-mapped as a virtual Modbus slave for user-assigned contiguous register polling by a SCADA client/master (up to 20,000 registers).
  • Poll remote devices (such as a Gas Chromatograph) by utilizing the Modbus Master serial port.
  • Alarm, event, and meter archive log files may be downloaded in Enron Modbus format.


System Requirements -EAFC Manager

This configuration software is designed for Microsoft Windows 7. Minimum hardware requirements for a Windows 7 system are as listed below. More advanced operating systems have significantly higher minimum requirements regardless of EAFC Manager minimum requirements.

  • 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor
  • 1 GB RAM (32-bit) or 2 GB RAM (64-bit)
  • 16 GB available hard drive space (32-bit) or 20GB (64-bit)
  • Assigned IP Address




Backplane Current Load

500mA max @ 5 VDC (Power supply distance rating of 4)

Operating Temperature

32°F to 140°F (0°C to 60°C)

Storage Temperature

-40°F to 185°F (-40°C to 85°C)


30g operational

50g non-operational

5g from 10 to 150 Hz

Relative Humidity

5% to 95% RH, with no condensation

LED Indicators

Module Status, Backplane Transfer Status, Application Status, Serial Activity

Ethernet port

1 Ethernet Application Port

10/100 Mbps, RJ45
Link and Activity LED
Auto crossover (Auto MDIX)

Serial Application Ports (P1 & P2)

2 Serial Application Ports

RJ45 (DB-9M with supplied cable) RS-232, RS-485, RS-422 jumper selectable

RS-232 handshaking configurable

500V optical isolation from backplane

Full hardware handshaking control, providing radio, modem and multi-drop support

Shipped with Unit

(2) RJ45 to DB-9M cables

(1) 6-foot DB-9F to DB-9F null modem cable


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