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R88D-1SN04H-ECT - Omron 1S EtherCAT servo drive

Documented EtherCAT servo-drive role for R88D-1SN04H-ECT, with source-backed evidence and explicit installation boundaries.

Documented function

Rebuilt from individual evidence

System position

Unknown: Evidence boundary

Omron identifies R88D-1SN04H-ECT as a 1S-series EtherCAT servo drive rated for 400 W.

The drive provides an EtherCAT command interface for the servo system.

The drive supports position, speed, and torque control modes.

The drive sits between the EtherCAT controller and the matched servo motor in the documented system.

The drive converts controller motion commands into electrical output for the motor.

Unknown: The installed controller configuration, motor pairing, firmware, and machine load are not established by the captured sources.

Exact reference
R88D-1SN04H-ECT
Category
Drives / VFD
Evidence checked
2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function
Controls the matched servo motor through EtherCAT motion commands.
System position
Sits between the EtherCAT controller and the matched servo motor.
Upstream / inputs
Receives EtherCAT motion commands from the upstream controller.
Downstream / outputs
Provides controlled electrical output to the matched servo motor.
Limitations
Unknown: The installed controller configuration, motor pairing, firmware, and machine load are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • Omron identifies R88D-1SN04H-ECT as a 1S-series EtherCAT servo drive rated for 400 W.

    Confidence: high

  • The drive provides an EtherCAT command interface for the servo system.

    Confidence: high

  • The drive supports position, speed, and torque control modes.

    Confidence: high

Inferences

  • The drive sits between the EtherCAT controller and the matched servo motor in the documented system.

    Confidence: medium

    Rationale: Omron identifies the drive as EtherCAT-based and documents its use with a matched servo motor.

  • The drive converts controller motion commands into electrical output for the motor.

    Confidence: medium

    Rationale: The documented command interface and motor control modes support this system-level signal path.

Unknowns

  • Unknown: The installed controller configuration, motor pairing, firmware, and machine load are not established by the captured sources.

    Confidence: low

    Missing evidence: The installed controller configuration, motor pairing, firmware, and machine load are not established by the captured sources.

System position diagram

Diagram showing R88D-1SN04H-ECT between EtherCAT controller and Matched servo motor.

Reading limit: system position only, not a wiring or safety drawing.

System position of R88D-1SN04H-ECT from the captured evidence.

Enlarged system diagram

Diagram showing R88D-1SN04H-ECT between EtherCAT controller and Matched servo motor.

System position of R88D-1SN04H-ECT from the captured evidence.

View Mermaid source
flowchart LR
  upstream[EtherCAT controller] --> unit[R88D-1SN04H-ECT]
  unit --> downstream[Matched servo motor]
View diagram labels
Nodes
EtherCAT controller; R88D-1SN04H-ECT; Matched servo motor
Edges
Upstream control reaches the product; The product provides the documented downstream function

Next action

Decision: The captured evidence supports the documented EtherCAT servo-drive role for R88D-1SN04H-ECT; verify the installed system before replacement.

Next action: Match the exact reference, controller or drive pairing, feedback arrangement, and site conditions against the cited documents before sourcing.

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