ABB RETA-02 Migration-Ready EtherNet/IP Adapter for Legacy Drives

Overview

ABB RETA-02 Migration-Ready EtherNet/IP Adapter for Legacy Drive Systems

The ABB RETA-02 is a migration-ready EtherNet/IP fieldbus adapter designed for seamless integration with ABB ACS800 and ACS550 series variable frequency drives. As legacy Profibus and DeviceNet communication modules reach end-of-life, the RETA-02 provides a direct upgrade path to modern EtherNet/IP-based control architectures without requiring drive replacement. This adapter is a proven replacement for discontinued modules including the RPBA-01 Profibus adapter and the RDNA-01 DeviceNet adapter, enabling facilities to modernize their communication infrastructure while preserving existing drive hardware investments.

The RETA-02 mounts directly into the drive’s option slot, maintaining the same mechanical footprint as predecessor adapters. Before installation, engineers must verify the drive’s firmware version supports EtherNet/IP cyclic I/O and explicit messaging — ACS800 firmware revision 7.x and above is recommended. The adapter supports both implicit (Class 1) and explicit (Class 3) messaging, making it compatible with Allen-Bradley ControlLogix and CompactLogix PLCs, Siemens S7 series with EtherNet/IP scanner modules, and Rockwell Automation Studio 5000 environments.

During migration from a RPBA-01 Profibus setup, the primary engineering tasks include remapping drive parameter node addresses, updating the PLC scanner configuration with the new EDS file, and verifying that the ACS800 control word and status word bit assignments remain consistent with the existing application logic. If the legacy system used a RDNA-01 DeviceNet adapter, the transition also requires reconfiguring the network topology from a daisy-chain DeviceNet segment to a star-topology Ethernet switch infrastructure — a change that typically involves the ABB NETA-21 remote monitoring tool or a managed industrial Ethernet switch for network segmentation.

Migration Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful RETA-02 integration into an existing automation system requires a structured pre-retrofit assessment. The first step is confirming that the ACS800 or ACS550 drive’s control board — typically the RMIO-11 or RMIO-02 — has an available option slot and that the slot’s backplane connector is undamaged. In multi-drive installations where several ACS800 units share a common DC bus, each drive requires its own RETA-02 adapter with a unique IP address assigned through the drive’s parameter group 51 (EtherNet/IP configuration).

Terminal wiring compatibility is generally maintained during this migration since the RETA-02 does not alter the drive’s analog or digital I/O terminal assignments. However, if the legacy system relied on the RPBA-01 to pass process data values (PDO) that were mapped to drive parameters, engineers must re-verify that the EtherNet/IP assembly instance mappings replicate the same parameter indices. The ABB NETA-21 remote monitoring gateway, if present in the installation, should also be updated to recognize the new EtherNet/IP communication path rather than the legacy Profibus segment.

For installations that include ABB ACS880 drives operating in parallel with legacy ACS800 units, the RETA-02 enables a unified EtherNet/IP network where both drive generations communicate through the same PLC scanner — eliminating the need for a separate Profibus master card in the controller rack. Panel builders upgrading control cabinets should also account for the Ethernet cable routing, RJ45 connector clearance, and the addition of a DIN-rail mounted industrial Ethernet switch such as the ABB EKI series or equivalent. Where signal isolation is required between the drive network and the plant SCADA backbone, a signal isolator or managed switch with VLAN support is recommended to protect drive communication integrity.

In systems where an ABB ACS800 MultiDrive configuration is being modernized, the RETA-02 works alongside the existing RDCO-02 or RDCO-04 drive-to-drive communication modules, which handle internal torque and speed reference distribution. The RETA-02 handles only the external fieldbus communication layer, so both modules can coexist in the same drive without conflict. Programming cable access via the ABB OPMP-01 panel or a USB-to-RS232 adapter remains available for local parameter editing during commissioning.

Downtime Control During System Migration

Minimizing unplanned downtime during a RETA-02 retrofit requires a phased commissioning approach. Before removing the legacy RPBA-01 or RDNA-01 adapter, a full parameter backup of the ACS800 or ACS550 drive should be performed using ABB DriveStudio or Drive Composer Pro. This backup preserves all motor control parameters, ramp settings, PID configurations, and I/O assignments, ensuring that the drive can be restored to its pre-retrofit state if commissioning issues arise.

The PLC program should be placed in a controlled stop state — not an emergency stop — before the adapter swap to allow the drive to complete any active deceleration ramps and reach a safe standstill. After installing the RETA-02 and importing the EDS file into the PLC project, the communication link should be verified in offline simulation mode before going live. This approach protects the original program logic and prevents unintended drive commands from being issued during the network reconfiguration phase.

For critical production lines where even brief interruptions are unacceptable, a parallel commissioning strategy is recommended: install the RETA-02 in a spare drive of the same model, complete all parameter configuration and PLC scanner testing offline, then perform a rapid swap during a scheduled maintenance window. This method reduces live commissioning time to under 30 minutes in most ACS800 installations. Field engineers should also verify HMI screen tag bindings that reference drive status words, as EtherNet/IP assembly instance data offsets may differ from the legacy Profibus PPO type structure used by the RPBA-01.

Retrofit Support FAQ

Q: Is the RETA-02 a direct replacement for the RPBA-01 Profibus adapter in ACS800 drives?
A: Yes, the RETA-02 occupies the same option slot as the RPBA-01 and uses the same mechanical mounting interface. However, it is a protocol migration — not a plug-and-play swap. Parameter group 51 must be reconfigured for EtherNet/IP, and the PLC scanner must be updated with the RETA-02 EDS file. Drive control word and status word bit assignments remain compatible.

Q: What pre-shipment testing is performed on the RETA-02 before dispatch?
A: Each RETA-02 unit undergoes a functional communication test prior to shipment, verifying EtherNet/IP link establishment, cyclic I/O data exchange, and adapter identification response. Units are dispatched only after passing this test. A support terms confirmed by quotation is included with every unit.

Q: Can the RETA-02 be used in ACS550 drives as well as ACS800?
A: Yes. The RETA-02 is compatible with both ACS800 and ACS550 series drives. For ACS550 installations, the adapter installs in the fieldbus adapter slot on the drive’s control board, and parameter group 53 is used for EtherNet/IP configuration. Firmware version 2.x or above is required on the ACS550.

Q: What is the typical lead time and stock availability for the RETA-02?
A: Stock is maintained across multiple regional warehouses to support emergency replacement requirements. Standard dispatch is within 1–3 business days for in-stock units. For urgent retrofit projects, expedited shipping options are available. Contact [email protected] or call +86 18359268345 to confirm current stock levels and lead times.

© 2026 KNMKS. All rights reserved.
Original Source: https://knmks.com
Contact: [email protected] | +86 18359268345

Product Identification

Brand / Ecosystem

ABB
ABB

Model / Series

RETA-02
S800 Series

Product Family

Variable Frequency Drives

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Drive range

AC drives, VFDs and accessories

Common needs

Voltage, kW/HP and load type

Project support

Motor control, energy saving and spares

Inquiry Support

• Input/output voltage and kW/HP confirmation
• Energy-saving motor control inquiry
• Accessory and spare-unit support

What to Send Us

• Brand and exact model number: ABB RETA-02
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference