Product Description of ProSoft MVI56-S3964RProduct Description of ProSoft MVI56-S3964R

MVI56-S3964R is a Siemens 3964R point-to-point communication module specially designed by ProSoft for the Rockwell ControlLogix platform. It supports both with and without the RK512 protocol, and is used for point-to-point data communication between ControlLogix PLC and third-party 3964R devices. It provides dual independent serial ports, timed transmission, and BCC verification. It is a dedicated solution for integrating old equipment / Siemens systems with the Rockwell platform.

I. Model Interpretation

MVI56: Communication module for ControlLogix 1756 platform

S: Siemens protocol

3964R: Siemens 3964R point-to-point communication protocol

R: Supports timed (Scheduled) transmission mode

II. Core Hardware Specifications

Compatible platforms: Rockwell ControlLogix 1756 series (local / remote racks)

Slot occupation: Single slot (standard 1756 size)

Backplane power consumption: 800mA @ 5VDC, 3mA @ 24VDC

Communication interfaces: 2× independent serial ports (PRT1/PRT2)

Protocols: RS-232/RS-422/RS-485 (software configurable)

Isolation: 2.5kV photoelectric isolation

Connector: DB9 pin

Configuration port: RS-232 (RJ45/DB9 adapter)

Data buffer: Maximum 512 bytes / transmission task

Status indicators: OK, APP, ERR, PRT1, PRT2 five groups of LED indicators

Operating temperature: 0°C ~ +60°C

Storage temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% (no condensation)

Anti-interference: Vibration 5g (10~150Hz), shock 30g (running) / 50g (non-running)

Certification: CE, UL, cURus, RoHS

III. Communication Performance Parameters

1. Protocol and Modes

Main protocol: Siemens 3964R (point-to-point)

Working mode:

Mode 1: 3964R + RK512: Supports DB-SEND/DB-FETCH instructions, data block / word read/write, message header parsing

Mode 2: Pure 3964R: Only block transmission, no RK512 instructions

Communication rate: 1.2kbps ~ 115.2kbps configurable

Verification mechanism: BCC block check code (3964R standard)

Transmission mode: Timed (Scheduled) + event triggered dual mode

2. Dual Serial Port Capability

Dual ports independent: PRT1/PRT2 can run different modes / rates simultaneously

Maximum connection: 1 point-to-point node per port (total 2 nodes)

Single packet maximum: 512 bytes (Mode 1/2 are consistent)

Byte swapping: Supports high and low byte swapping to adapt to different byte orders

Flow control: RTS/CTS, XON/XOFF configurable

3. Advanced Features

Independent processor: 32-bit ARM, does not occupy ControlLogix CPU scan cycle

Hot plugging: Supports online replacement, system without downtime

Configuration storage: Flash power-off saving, supports upload/download

GSD compatibility: Provides standard GSD files to adapt Siemens configuration

Data mapping: User-defined 3964R data area ↔ Logix tag IV. Core Features and Advantages

1. Full Compatibility (Core Advantage)

Strictly adheres to Siemens 3964R standards, 100% compatible with Siemens S5/S7 / drives / instruments

Dual mode support: compatible with RK512 advanced instructions, simple equipment for pure 3964R adaptation

Two independent serial ports: simultaneously connect two 3964R devices, saving slots and costs

2. Timing + Event Dual Transmission

Timing mode: automatic transmission at a cycle (10ms to hour-level), suitable for low-speed periodic data

Event triggering: triggered by Logix program instructions, real-time response to control requirements

BCC verification + retransmission mechanism: zero data loss in industrial strong interference environment

3. Seamless ControlLogix Integration

Single slot, backplane power supply, no additional power / gateway required

Provides Studio 5000 AOI, ladder diagram routines, configuration tools

Data transparent mapping, 80% reduction in programming workload

4. Industrial-grade Reliability and Maintenance

Optical isolation, wide temperature range, high shock resistance, stable operation in harsh industrial environments

Two independent LED indicators + error code reporting, rapid fault location

Support for firmware upgrade, configuration backup / restoration

V. Typical Application Scenarios

Upgrade of old systems: ControlLogix connects to Siemens S5/S7 3964R network

Cross-brand point-to-point: Rockwell ↔ Siemens drives / instruments / valves direct connection

Low-speed device integration: sensors, analyzers, barcode devices 3964R connected to Logix

Dual devices parallel: single module simultaneously connects to two 3964R devices (such as dual S5 systems)

Production line renovation: old Siemens equipment and new ControlLogix system data interoperability

Power plants / cement / metallurgy: 3964R dedicated instruments connected to Rockwell PLC

VI. Summary

MVI56-S3964R is a dedicated solution for Siemens 3964R point-to-point communication on the ControlLogix platform. With full compatibility of 3964R + RK512, dual independent isolated serial ports, timing + event dual transmission, reliable BCC verification, seamless Logix integration, and industrial-grade stability as core advantages, it is designed specifically for point-to-point communication between Rockwell and Siemens / 3964R old equipment, and is a cost-effective single-slot module for cross-platform low-speed point-to-point integration.