ABB Inverter Fiber Optic Communication Synchronous Control

ABB inverters use fiber optic communication modules like FDCO, RDCO, and CINT boards to enable multi-drive synchronous control with high-speed, isolated, and reliable data transfer.

Fiber Optic Communication Modules

ABB inverters, particularly the ACS800 and ACS880 series, support fiber optic communication for multi-drive synchronization using specialized modules:

• FDCO-01/02: These modules enable fiber optic connections on the DDCS protocol for ABB drives. They include connectors for fiber optic channels (Ch A and Ch B) and allow adjustment of transmitter current to match cable length. Multiple devices can be connected in a ring topology for synchronous operation, ensuring proper signal transmission and isolation between drives .
• RDCO-03C: This add-on module provides four fiber optic DDCS channels (CH0–CH3) for ACS800 inverters, allowing multiple inverters to communicate and synchronize motor control and I/O operations .
• CINT-01C: A multi-drive communication fiber optic board for ACS800 inverters, supporting protocols such as PROFIBUS-DP, MODBUS RTU, RCOM/RCOM+, and Siemens 3964R. It allows selectable communication rates from 9.6 kBit/s to 12 MBit/s and includes protection features like 4000V lightning and surge protection .

Fiber Optic Cabling

ABB systems use plastic-core and glass-fiber cables depending on distance requirements:

• Plastic-core cables: Suitable for short distances (<30 m).
• Glass-fiber cables: Suitable for long distances (up to 1000 m), providing electrical isolation between devices at different potential levels . Fiber optic cabling ensures high-speed, interference-free communication and prevents current flow between connected inverters, which is critical for synchronous control.

Synchronous Control Applications

Fiber optic communication enables multi-inverter synchronization, which is essential in applications like:

• Wind power plants with multiple ACS800 drives.
• Industrial multi-motor systems requiring coordinated speed and torque control.
• High-reliability systems where electrical isolation and immunity to EMI are critical. The modules allow ring or daisy-chain topologies, ensuring that all connected inverters receive synchronized control signals. Proper installation requires matching transmitter and receiver types, correct channel connections, and adherence to EMC and safety guidelines .

Installation and Configuration

• Modules are installed directly on the inverter or control board using DIN rail or screw mounting.
• Fiber optic cables are routed according to the hardware manual, with attention to color coding and terminal markings to ensure correct transmitter-to-receiver connections .
• Redundant power supply and surge protection are often included to maintain reliable operation in industrial environments .

Summary

ABB inverter fiber optic communication modules like FDCO, RDCO, and CINT provide a robust solution for synchronous multi-drive control, offering high-speed, isolated communication over fiber optic links. Proper selection of modules, cabling, and installation ensures reliable operation in demanding industrial and renewable energy applications .