Product Details

The ProSoft MVI56-AFC is a single-slot in-chassis dedicated flow computer module for Rockwell ControlLogix 1756 rack, designed for accurate hydrocarbon liquid and gas flow calculation and custody transfer measurement. It receives pressure, temperature, differential pressure and pulse meter data from ControlLogix analog and counter I/O modules, then performs industry-standard flow calculations following AGA, API and MPMS standards. It computes flow rate, accumulated volume, mass and energy values, and supports hourly and daily data archiving, timestamped event logs and audit trails for measurement compliance. The module is equipped with two isolated serial communication ports configurable as RS232, RS422 or RS485, supporting Modbus master and slave functions to exchange measurement data with SCADA systems, remote displays and other Modbus devices. It runs as a co-processor independent of the ControlLogix scan cycle, so complex flow computation will not affect the main control logic. Users can configure meter parameters, calculation formulas and alarm thresholds via AFC Manager software, and the matching add-on instructions help seamless data mapping inside Studio 5000 or RSLogix 5000.

This module installs directly into the standard 1756 ControlLogix chassis and draws 800mA at 5VDC from the backplane. It supports hot-swappable operation for convenient maintenance without shutting down the whole rack. The two application serial ports offer 1000V isolation from the backplane to reduce interference. Front LED indicators display backplane status, serial communication activity and module fault status for fast on-site inspection. It provides rich diagnostic information including meter status, calculation alarms, communication error counters and archive record viewing. It adopts industrial EMC design for oil and gas field environments, with an operating temperature range of 0°C to 60°C. It uses built-in backup battery to retain real-time clock and archive data during power loss, and supports configuration file backup and firmware upgrade.

This flow computer module is widely used in oil and gas pipelines, wellhead measurement stations, custody transfer skids, natural gas distribution and refinery auxiliary measurement projects. It integrates professional flow measurement functions into the ControlLogix rack without separate standalone flow computers, simplifying cabinet layout and reducing hardware cost for oil and gas measurement systems. As a discontinued legacy module, the MVI56-AFC is mainly supplied as spare replacement parts for running oil and gas measurement systems. It maintains stable and compliant flow calculation and data archiving, preserves the original field transmitters and pulse meter wiring, and lowers the renovation cost of custody transfer measurement applications.