Product Description of ProSoft MVI71-DNP

MVI71-DNP (DNP 3.0 Master/Slave Communication Module) is a single-slot DNP 3.0 serial communication module specially developed by ProSoft for the Rockwell PLC-5 platform. It supports dual functions of 2 master stations/secondary stations at the DNP 3.0 level, equipped with 3 fully isolated serial ports (RS-232/422/485), designed for SCADA systems in power, water conservancy, oil and gas, etc., to achieve reliable data interconnection between PLC-5 and DNP 3.0 devices, remote terminals, and SCADA master stations. 

I. Model Analysis

MVI71: PLC-5 1771 Platform-specific Series

DNP: DNP 3.0 (Distributed Network Protocol 3.0)

Core Positioning: DNP 3.0 Master Station / Slave Station, Level 2 Compatibility, 3 Independent Fully Isolated Serial Ports, RS-232/422/485, SCADA Communication, Single Slot, Zero PLC Load

II. Core Hardware Specifications

Compatible Platforms

PLC-5: Full series PLC-5/11, /12, /15, /20, /25, /30, /40, /40L, /60, /80, /80E

1771 Backplane, Single-slot Installation

Support for Local / Remote Rack

Backplane Power Consumption: Maximum 800mA @ 5.1VDC ProSoft Technology Inc

Serial Interfaces (3 Ports)

Application Ports (P1, P2, P3): 3 Independent, Jumper selectable RS-232 / RS-422 / RS-485, RJ45 (with DB9 adapter)

RS-232: Point-to-Point Short Distance (15m)

RS-422: Full-Duplex Long Distance (1200m)

RS-485: Half-Duplex Multi-Point (32 Nodes, 1200m)

Electrical Isolation: 500Vrms Optical Isolation (Between Backplane and All Serial Ports) ProSoft Technology Inc

Baud Rate: 110 ~ 115200 bps

Data Format: 8/N/1, 8/E/1, 8/O/1

Protocol Support

DNP 3.0: Master (Master) + Slave (Slave) Dual Mode, Level 2 (Level 2) Compatibility

Function Codes: Support All Standard DNP 3.0 Function Codes

Data Objects: Binary Input, Binary Output, Analog Input, Analog Output, Counter, Floating Point

Data Buffer: 6000 Bytes Bidirectional Shared Database

Master Station Function

Active Polling of 32 DNP Slave Stations

Support for Class 0/1/2/3 Data Polling, Event Triggering, Deadband (Deadband)

Each Port Independent Configuration, Independent Polling List

Slave Station Function

Respond to DNP Master Station Read / Write Requests

Support Event Generation, Active Reporting (Unsolicited Response)

Data Mapping to PLC-5 File Registers

LED Status: OK, BP, P1, P2, P3, ERR Six Sets of Indicators

Operating Environment ProSoft Technology Inc

Temperature: 0°C ~ +60°C

Storage: -40°C ~ +85°C

Humidity: 5% ~ 95% (No Condensation)

Shock Resistance: 30g (Operation), 50g (Non-Operation)

Certification: CE, UL, cURus, RoHS, DNV, GOST-R ProSoft Technology Inc

III. Core Functions and Performance

1. DNP 3.0 Master Station / Slave Station Dual Mode (Core Advantage)

Master Mode (Master)

Active Polling: PLC-5 as the master, periodically / triggeringly reads remote DNP slave station data

32 Slave Stations / Ports: Single Module can connect up to 96 DNP Devices (3 Ports × 32)

Event Driven: Supports Class 1/2/3 Events for Priority Reporting, Improving Real-time Performance Deadband Control: Only upload when the analog quantity exceeds the threshold, reducing network load

Time Synchronization: Supports DNP time synchronization, unified clocks across the entire network

Slave Mode (Slave)

SCADA Access: PLC-5 acts as a slave and connects to the DNP SCADA master system

Unsolicited Reporting: Immediate upload upon event occurrence, no polling required

Data Security: Configurable read/write permissions, address range, password protection

DNP 3.0 Level 2 Compatibility

100% Compatible with IEC 60870-5 Standard

Supports Confirmation/Non-Confirmation Services, Segmented Transmission, Timestamp, Event Classification

Industrial-grade Reliability: Link Confirmation, Automatic Redundancy, Timeout Handling, Error Diagnosis

2. Three Full Isolated Serial Ports (High Flexibility)

Three ports are completely independent

P1/P2/P3 do not interfere with each other, independently configured protocols, parameters, polling lists

Three Links Parallel: Connect multiple DNP devices and SCADA master station simultaneously

RS-232/422/485 Three Modes

Compatible with Point-to-Point, Long Distance, Multi-Point Bus All Topologies

500V Full Isolation: Anti-surge, anti-static, elimination of ground circulating current, protecting PLC and field devices

Multi-point Network

RS-485 Supports 32 Nodes, Saves Wiring, Reduces Cost

3. Deep Integration with PLC-5 System

PLC-5 Memory Mapping

6000-byte Shared Database: Direct mapping of PLC-5 files (N, B, F, T, C files)

BTR/BTW Block Transmission: Efficient data interaction, zero PLC programming

Module Status, Port Status, Slave Status, Event, Error Fully mapped to PLC Tags

Configuration Tool

ProSoft Configuration Builder (PCB): Visual Configuration

DNP Master/Slave Parameters, Polling Lists, Event Classes, Deadband, Mapping Rules Graphical Editing

Online Diagnosis: Real-time Monitoring, Packet Capture, Event Log, Error Tracking, Communication Statistics

4. Industrial-grade Reliability (SCADA Level)

Full Electrical Isolation

500Vrms Triple Isolation: Port - Port, Port - Backplane, Port - Power Full Isolation

Stable Operation in Industrial Field: Strong Interference, Ground Potential Difference, Lightning Strike Environment

Powerful Diagnosis and Fault Tolerance

Link Status, Slave Status, Communication Quality, Error Count Real-time Monitoring

Breakout Automatic Reconnection, Command Retry, Event Buffering, Fault Isolation

Detailed Event Log, Error Code, Diagnostic Information, Quick Troubleshooting

Independent Operation

Zero PLC CPU Load, Does Not Affect Scan Cycle

Module Failure Does Not Affect PLC Host

Four. Core Features and Advantages

1. Professional DNP 3.0 SCADA Communication

Master + Slave Dual Mode: Fully compatible with SCADA networking

DNP 3.0 Level 2: 100% Compatible with Power/Water Standards

3 Independent Isolated Serial Ports: Three times connection capacity, saves slots

Event-driven + Deadband + Active Reporting: Efficient, Real-time, Low Bandwidth Usage

500V Full Isolation: SCADA Level Industrial Protection

2. Optimized for PLC-5

1771 Single Slot: Compatible with all PLC-5, Protects Old System Investment

6000-byte Database: Satisfies Large-scale SCADA Data Volume

BTR/BTW Efficient Transmission: Native Data Interaction of PLC-5

Zero PLC Load: Does Not Affect Control System Performance

3. Flexible, Universal, Easy to Use RS-232/422/485 Three Modes: Fully compatible with all topologies

32 Slave Stations / Ports: Large capacity, high scalability

PCB Visual Configuration: Quick deployment, no underlying programming required

Sample Program + AOI: Out-of-the-box ready, shortens development cycle

Wide temperature range, shock-resistant, no fan: Long-term stability, maintenance-free

4. Industry Standard Certification

Preferred in the power / water conservancy / oil and gas industries

UL/cUL, CE, RoHS, DNV, GOST-R Global Certification by ProSoft Technology Inc

3-year warranty, global technical support

VII. Typical Application Scenarios

PLC-5 Access SCADA: PLC-5 acts as a DNP slave station to access the power / water conservancy SCADA master station

PLC-5 Polling Remote Terminal: PLC-5 acts as a DNP master station to poll RTU, FTU, DTU, and instruments

Multi-system Interconnection: PLC-5 ↔ Third-party DNP PLC, PAC, controller Data exchange

Power Automation: Substation, distribution network, power plant PLC-5 system DNP 3.0 communication

Water Conservancy and Irrigation: Reservoir, water plant, pumping station SCADA system integration

Oil and Gas Pipelines: Long-distance pipeline RTU and PLC-5 interconnection

Renovation of Old Plants: PLC-5 outdated system Upgrade to DNP 3.0 network to protect investment

VIII. Summary

MVI71-DNP is the flagship solution for PLC-5 platform DNP 3.0 SCADA communication. With DNP 3.0 master station / slave station dual mode, level 2 compatibility, 3 independent fully isolated serial ports (RS-232/422/485), 6000-byte large-capacity database, event-driven, dead zone control, active reporting, zero PLC load, industrial-level full isolation, deep integration of PLC-5, and global certification as the core advantages. ProSoft Technology Inc. is designed specifically for SCADA system integration, PLC-5 access to DNP network, remote terminal polling, multi-system interconnection, old plant renovation, and is a high-performance, highly reliable, one-stop SCADA standard module for Rockwell PLC-5 accessing DNP 3.0 industrial network.