Description

The MVI71-ADM is a C-Programmable Application Development Module designed for the PLC-71 series backplane. This module provides a powerful platform for engineers to develop custom communication algorithms or proprietary protocols that are not supported by standard industry modules. It is primarily utilized in specialized sectors such as offshore oil platforms, aerospace testing facilities, and high-speed material handling. By allowing the execution of user-developed C code directly on the hardware, the MVI71-ADM bridges the gap between standard PLC logic and complex external system requirements, ensuring high-speed data processing and reducing the risk of system bottlenecks in mission-critical applications.

Hardware Architecture

The MVI71-ADM features a robust hardware design built around an independent processor, allowing it to execute complex mathematical functions and protocol framing without taxing the host PLC CPU. It is equipped with two high-speed serial ports that can be independently programmed for RS-232, RS-422, or RS-485 signaling. The C programming environment provides deep access to the hardware interrupts and timers, enabling the development of deterministic communication drivers. This architecture is ideal for redundant systems where custom handshake signals or non-standard baud rates are required to maintain network integrity between the controller and legacy field devices.

Features

• Independent processor for offloading complex tasks from the host PLC CPU.
• Two configurable serial ports supporting RS-232, RS-422, or RS-485.
• C-language development environment for custom protocol implementation.
• Direct access to hardware interrupts and timers for deterministic performance.
• User-programmable status LEDs for custom diagnostic feedback.

Applications

• Custom protocol development for legacy equipment integration.
• High-speed data acquisition and pre-processing.
• Specialized communication drivers for aerospace and offshore oil platforms.
• Material handling systems requiring non-standard serial signaling.

Technical Specifications

Installation Guidelines

• Ensure the PLC backplane power is disconnected before inserting or removing the module.
• Seat the module firmly into the designated PLC-71 slot to ensure proper backplane contact.
• Use shielded communication cables for serial connections to minimize EMI interference.
• Maintain adequate ventilation in the cabinet to ensure operating temperatures remain below 60 deg C.
• Follow standard ESD precautions when handling the module to prevent damage to internal circuitry.

FAQ

What is the primary purpose of the MVI71-ADM?

The MVI71-ADM is designed to allow developers to write custom C-code to create proprietary communication protocols or specialized algorithms that are not natively supported by the PLC backplane.

Can I use this module for RS-485 communication?

Yes, the two serial ports on the MVI71-ADM are software-configurable and support RS-232, RS-422, and RS-485 signaling standards.