The Yokogawa AFG84D Duplexed Field Control Station Migration Kit is designed to migrate existing CENTUM-XL Field Control Stations (FCS) to the CENTUM VP platform while preserving existing Field I/O (FIO) infrastructure wherever possible. The kit provides a duplexed Field Control Unit (FCU), redundant V net communications, and dual-redundant ESB bus support, allowing facilities to modernize their control systems with minimal process interruption and reduced rewiring requirements. Proper installation and commissioning are essential to ensure a successful migration and reliable long-term operation.

Contents

• 1. AFG84D Migration Kit Overview
• 2. Technical Features
• 3. Typical Migration Applications
• 4. Migration Planning
• 5. Hardware Inspection
• 6. Installation Environment
• 7. Rack Installation Procedure
• 8. Power Supply Connections
• 9. V net and ESB Bus Connections
• 10. Existing FIO Integration
• 11. Migration Commissioning
• 12. Functional Verification
• 13. Preventive Maintenance
• 14. Practical Migration Case
• 15. Frequently Asked Questions

AFG84D Migration Kit Overview

The AFG84D is a duplexed migration solution specifically intended for upgrading CENTUM-XL systems to CENTUM VP while continuing to use compatible existing FIO equipment. The migration kit includes redundant controller hardware and migration components that simplify replacement of legacy controllers without extensive field rewiring.

Technical Features

• Duplexed Field Control Unit architecture
• Designed for CENTUM-XL migration
• Supports existing FIO infrastructure
• Dual-redundant V net communication
• Dual-redundant ESB bus support
• 32 MB controller memory
• Automatic processor switchover

Typical Migration Applications

• CENTUM-XL modernization projects
• Brownfield control system upgrades
• Petrochemical plants
• Oil and gas facilities
• Power generation plants
• Large continuous process industries

Migration Planning

• Review existing control architecture
• Verify hardware compatibility
• Prepare migration schedule
• Create complete system backups
• Develop rollback procedures

Hardware Inspection

• Verify migration kit contents
• Inspect controller modules
• Check communication interfaces
• Inspect mounting hardware
• Verify accessory components

Installation Environment

• Maintain adequate ventilation
• Avoid excessive humidity
• Prevent dust contamination
• Reduce cabinet vibration
• Maintain recommended operating temperature

Rack Installation Procedure

1. Shut down the legacy controller according to plant procedures.
2. Install the AFG84D hardware in the designated rack position.
3. Secure both processor modules.
4. Verify mechanical installation.
5. Inspect cable routing.
6. Confirm connector engagement.

Power Supply Connections

• Connect redundant power supplies
• Verify input voltage
• Inspect protective devices
• Confirm grounding integrity
• Verify power indicators

V net and ESB Bus Connections

• Connect redundant V net interfaces
• Connect redundant ESB buses
• Inspect network cables
• Verify communication addressing
• Label all communication wiring

Existing FIO Integration

BACK UP LEGACY CONFIGURATION
INSTALL AFG84D MIGRATION KIT
CONNECT POWER
CONNECT V NET
CONNECT ESB BUS
VERIFY FIO CONNECTIONS
DOWNLOAD APPLICATION
START COMMISSIONING

Migration Commissioning

• Power up both controllers
• Verify processor synchronization
• Download CENTUM VP configuration
• Verify communication status
• Confirm FIO operation
• Document commissioning results

Functional Verification

• Verify active controller operation
• Confirm standby synchronization
• Test automatic switchover
• Validate field I/O communication
• Monitor controller diagnostics

Preventive Maintenance

• Review diagnostic logs regularly
• Verify redundancy periodically
• Inspect communication cables
• Maintain configuration backups
• Inspect cabinet cooling systems

Practical Migration Case

During a scheduled modernization project at a chemical manufacturing facility, engineers replaced a legacy CENTUM-XL controller with an AFG84D migration kit while retaining the installed FIO system.

After the initial startup, the standby processor failed to synchronize because one ESB communication cable had been connected to the incorrect redundant channel.

Following correction of the wiring:

• Processor synchronization completed successfully.
• Existing FIO modules operated normally.
• Automatic controller switchover passed testing.
• The migration was completed without additional field rewiring.

Frequently Asked Questions

What is the AFG84D used for?

The AFG84D is a duplexed Field Control Station Migration Kit used to upgrade existing CENTUM-XL systems to CENTUM VP while continuing to use compatible FIO hardware.

Does the AFG84D support controller redundancy?

Yes. The migration kit includes duplexed controllers with automatic processor switchover and dual-redundant V net and ESB bus communication.

Can existing field wiring be reused?

The migration solution is specifically intended to minimize plant modifications by allowing continued use of compatible existing field infrastructure during migration. Actual reuse depends on the installed system configuration and migration plan.

Summary: Proper installation of the Yokogawa AFG84D Duplexed Field Control Station Migration Kit requires careful migration planning, correct rack installation, redundant power and communication wiring, successful controller synchronization, and thorough commissioning. Following these procedures enables reliable migration from CENTUM-XL to CENTUM VP while minimizing plant downtime and preserving compatible field infrastructure.