Schneider Electric Altivar 71 Modbus Card User Manual

About this manual

This manual describes the Modbus/Uni‑Telway communication card for the Altivar 71 variable‑speed drive. It covers hardware description, installation steps, switch coding for address and polarization, wiring recommendations, and the full set of Modbus functions supported by the card.

Safety precautions, connection diagrams, and detailed configuration procedures are included, along with troubleshooting guidance for communication faults and card diagnostics.

What's inside

• Before you begin
• Documentation structure
• Introduction
• Hardware setup
• Switch coding
• Connecting to the bus
• Configuration
• Diagnostics
• Modbus protocol
• Appendix

Specifications

Frequently asked questions

What connector does the Modbus card use?

It uses a female 9‑way SUB‑D connector for the Modbus bus connection.