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ProSoft Technology MVI56-MDA4 is a multi-drop communications module designed for use with Allen-Bradley ControlLogix PLCs. It enables communication with Modbus serial devices (Modbus RTU/ASCII masters or slaves) over RS-485 networks in multi-drop configurations.
Product Specifications
Key Features:
Modbus Protocol Support: Acts as a Modbus RTU/ASCII master or slave.
RS-485 Interface: Supports multi-drop networks (up to 32 devices per port).
ControlLogix Compatibility: Installs in a 1756 backplane and communicates with the processor via ProSoft configuration blocks.
High-Speed Data Transfer: Efficiently exchanges data between the ControlLogix CPU and Modbus devices.
Flexible Configuration: Configurable via ProSoft Configuration Builder (PCB) software.
Isolation: Provides electrical isolation for noise immunity in industrial environments.
Applications:
Connecting ControlLogix PLCs to Modbus RTU/ASCII devices (e.g., sensors, drives, meters).
Integrating legacy Modbus equipment into modern Allen-Bradley control systems.
Multi-drop networks where multiple Modbus devices share a single RS-485 bus.
Installation & Configuration:
Hardware Setup:
Software Configuration:
Use ProSoft Configuration Builder (PCB) to set up Modbus parameters (baud rate, parity, station addresses).
Define tag-based mapping for data exchange between ControlLogix and Modbus devices.
PLC Logic:
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