Enhanced Liquid & Gas Flow Computer for CompactLogix®


ProSoft Technology’s 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 your wiring to your transmitters and I/O devices.


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Features and Benefits

  • Meter runs: The module can calculate up to 12 meter runs with four streams per run simultaneously, making it cost-effective, since more meters can be connected to a single flow computer.
  • Modbus capabilities: Remote configuration and diagnostics via Ethernet (Modbus® TCP/IP). 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.


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


  • The module is recognized by the processor as an Input/Output module.
  • The included 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 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 directly on the module and stored in non-volatile memory.
  • Data archiving is available for each meter run, hourly for up to 1,440 records (60 days) and daily for up to 1,440 records. Archive records can additionally be used in batch mode and triggered directly within the CompactLogix® PAC.
  • Event logging feature provides storage of up to 2,000 station events.

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 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.

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

RJ45 to DB-9M cables for each port


CB Safety 339.50 kB Last Modified 01/28/2019
Ex Certificate (ATEX Directive) 327.36 kB Last Modified 01/28/2019
UL/cUL; Class 1, Div. 2 230.89 kB Last Modified 02/27/2019