ProSoft MVI56-LTQ Product Description

MVI56-LTQ is a Limitorque valve actuator master station communication module specially designed by ProSoft for the Rockwell ControlLogix platform. It is used to directly connect the ControlLogix system to the Limitorque valve actuator network, enabling centralized monitoring, remote control, and status collection of the valves. ProSoft Technology Inc.

I. Model Interpretation

MVI56: Communication module for the ControlLogix platform

LTQ: Limitorque Valve Actuator Master Station Protocol (Limitorque Master Protocol)

II. Core Hardware Specifications

Compatible platform: Rockwell ControlLogix 1756 series

Slot occupancy: Single slot (standard 1756 size)

Backplane power consumption: 800mA @ 5VDC ProSoft Technology Inc

Physical interface:

2 serial communication ports (Port A/Port B)

Electrical standard: RS-232 / RS-485 jumpers optional ProSoft Technology Inc

Connector: DB-9 female

Data buffer: 1500 bytes (16-bit) register space ProSoft Technology Inc

Status indication: OK/APP/ERR three-color LED indicator

Operating temperature: 0°C ~ +60°C

Storage temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% (no condensation)

Certifications: CE, UL, cURus, RoHS

III. Communication Performance Parameters

1. Protocol and Mode

Main protocol: Limitorque Valve Actuator Master Station Protocol (Master) ProSoft Technology Inc

Communication rate: 1200 ~ 38400 bps configurable ProSoft Technology Inc

Network topology: Dual-port polling (Port A/B), single-port independent operation ProSoft Technology Inc

Slave station capacity: Up to 150 Limitorque valve devices ProSoft Technology Inc

2. Core Functions

Dual-port polling mechanism: Completely simulates the original Limitorque Port A/B polling logic ProSoft Technology Inc

Valve control commands: Fully open, fully closed, stop, percentage positioning, ESD emergency stop ProSoft Technology Inc

Status collection: Real-time reading of valve position, switch status, fault code, operation statistics ProSoft Technology Inc

Data mapping: 1500-byte register automatically mapped to ControlLogix controller tags ProSoft Technology Inc

Fault handling: Maintains / resets valve status when communication is interrupted configurable ProSoft Technology Inc

3. Compatible Devices

Limitorque MX, QX, L120, LCC series actuators Limitorque DDC-100M, UEC-3-DDC modules, ProSoft Technology Inc.

Valvcon IVO series (only multi-point mode) ProSoft Technology Inc.

IV. Core Features and Advantages

1. Factory-level compatibility

100% compatible with Limitorque proprietary protocol and polling timing

No need for additional gateway, directly replace Limitorque factory master station

Support complete valve command set and status diagnosis

2. Dual-port efficient network

Dual-port parallel polling, network scanning speed increased by 100%

Single-port failure does not affect the operation of the other port

Support loop, single-port A, single-port B three polling modes ProSoft Technology Inc.

3. Large capacity, high reliability

Single module manages 150 valves, meeting the needs of large factories

Industrial-level isolation, wide temperature range, anti-interference design

Asynchronous data transmission, does not occupy PLC main cycle time

4. Seamless integration with ControlLogix

Directly insert into 1756 rack, no additional power supply required

Provide RSLogix 5000 / Studio 5000 AOI and ladder diagram routines

Register data automatic mapping, simplifies programming

V. Typical Application Scenarios

Oil and gas: long-distance pipeline, station valve control

Refining and chemical: emergency shut-off valve, regulating valve monitoring

Power: power plant water and steam system valve cluster control

Water treatment: water plant, sewage plant valve automation

Metallurgy and mining: process medium valve remote control

Paper / food: process fluid valve management

VI. Summary

MVI56-LTQ is a dedicated solution for connecting Limitorque valve network to ControlLogix system. With dual-port parallel polling, 150 large capacity, factory protocol compatibility, seamless PLC integration as core advantages, it is designed for centralized control of large-scale valve actuators, and is an ideal choice for industries such as oil, chemical, power, and water treatment.