1. Product Overview

• Model: MVI56‑AFC

• Manufacturer: ProSoft Technology (inRAx series)

• Platform: Allen‑Bradley ControlLogix (1756 chassis, single‑slot)

• Function: Dedicated flow computer for hydrocarbon gas/liquid measurement, custody transfer, and energy calculation.

• Purpose: Computes flow rate, total volume, mass, and energy; replaces standalone flow computers.

• Integration: Backplane data exchange with ControlLogix tags; AGA/API compliant calculations.

2. Key Features

• 16 independent meter runs (gas or liquid)

• Industry standards: AGA‑3, AGA‑7, AGA‑8, AGA‑9, API MPMS

• 3 configurable Modbus ports: 1×Ethernet (Modbus TCP), 2×serial (RS‑232/422/485)

• Custody transfer ready: Meter proving, audit trails, event logging

• Data retention: Battery‑backed RAM (7+ days)

• Display: 4‑character alphanumeric LED for status/values

• Diagnostics: PWR, RUN, BP LINK, PORT ACT LEDs

• Approvals: CE, UL/cUL, CSA, ATEX, RoHS

3. Technical Specifications

General

• Slot usage: 1 slot (local/remote 1756 rack)

• Backplane current: 800 mA @ 5 VDC; 3 mA @ 24 VDC

• Data mapping: Direct tag access; 10,000+ register mapping

• Configuration: ProSoft Configuration Builder (PCB)ProSoft Technology Inc

Flow Calculation

• Gas types: Natural gas, LNG, propane (AGA standards)

• Liquid types: Crude oil, refined products (API MPMS)

• Calculations:

  • Gas: Volume, mass, energy (BTU/MJ), compressibility

  • Liquid: Volume, mass, density, temperature correctionProSoft Technology Inc

• Inputs: Analog (4–20 mA), pulse, serial (Modbus)

Communication

• Ethernet: 10/100 Mbps, Modbus TCP server/clientProSoft Technology Inc

• Serial ports (2): RS‑232/422/485, Modbus RTU

• Isolation: 500 V optical isolation (ports ↔ backplane)

Environmental

• Operating temp: 0°C to +60°C (32°F to 140°F)

• Storage temp: ‑40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Vibration: 5 g (10–150 Hz)

• Shock: 30 g (operational), 50 g (non‑operational)

4. LED Indicators

• PWR: On = backplane power OK

• RUN: On = operational; flashing = firmware activity

• BP LINK: On = backplane communication active

• P1/P2/P3 ACT: Flashing = data traffic on port

5. Installation & Configuration

1. Power off chassis; insert MVI56‑AFC into 1756 slot.

2. Connect sensors (analog/pulse) and Modbus devices to ports.

3. Power on; verify in Studio 5000 I/O tree.

4. Use PCB to configure:

   • Meter runs (1–16), fluid type, standards (AGA/API)ProSoft Technology Inc

   • Input scaling, alarm limits, communication parametersProSoft Technology Inc

5. Download config; archive hourly/daily records to CF cardProSoft Technology Inc.

6. Applications

• Oil & gas pipelines: Custody transfer measurement

• Natural gas distribution: City gate stations, industrial metering

• Refineries: Liquid product flow monitoring

• LNG facilities: Gas/liquid energy calculation

• Chemical plants: Hydrocarbon process flow control

7. Advantages

• All‑in‑one: Eliminates external flow computers; reduces cost/complexity

• High accuracy: AGA/API compliance for fiscal metering

• Scalable: 16 meter runs for multi‑stream applications

• Seamless Rockwell integration: Native tag access, no custom logic