Omron R88D-KN01H-ECT-R

Questions and Answers

A
Adam WaltonNov 24, 2025
Why Omron R88D-KN01H-ECT-R show Main Circuit Power Supply Undervoltage (PN)?
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  Allison MitchellNov 24, 2025
  Omron Servo Drives may display a Main Circuit Power Supply Undervoltage error (PN) due to several reasons. If the Undervoltage Error Selection is set to 1, a momentary power interruption between L1 and L3 might have exceeded the specified Momentary Hold Time. Other causes include low power supply voltage, insufficient power supply capacity due to inrush current, phase-failure in 3-phase input models operated with single-phase power, or a faulty Servo Drive. To resolve this, measure the voltage between the connector (L1, L2, and L3) lines. Increase the power supply voltage or change the power supply. Check the Momentary Hold Time setting. Ensure each phase of the power supply is correctly connected, using L1 and L3 for single-phase 100 V and 200 V. Increase the power supply capacity. If the...
K
Kevin TerrellAug 27, 2025
How to fix Error Counter Overflow in Omron R88D-KN01H-ECT-R Servo Drives?
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  Chad SnyderAug 28, 2025
  To fix an Error Counter Overflow in Omron Servo Drives, the issue arises when position error pulses exceed the Following error window setting. This can occur if motor operation doesn't follow the command or if the Following error window value is too small. Begin by checking if the Servomotor rotates according to the position command pulse. Examine the torque monitor for saturated output torque and adjust the gain accordingly. Maximize the set values on the Positive and Negative torque limit values. Ensure the encoder is wired correctly. Lengthen the acceleration and deceleration times, and reduce the load and speed. If necessary, increase the set value of object 6065 hex.
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David BautistaAug 29, 2025
Why Omron R88D-KN01H-ECT-R Servo Drives show Regeneration Overload?
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  ttorresAug 29, 2025
  Omron Servo Drives may show a Regeneration Overload if the regenerative energy exceeds the processing capacity of the Regeneration Resistor. This can occur due to high regenerative energy during deceleration from a large load inertia, high Servomotor rotation speed, or the external resistor's operating limit being restricted to a 10% duty. Check the load rate of the Regeneration Resistor through communications. Increase the capacities of the Servo Drive and the Servomotor, and lengthen the deceleration time. Use an External Regeneration Resistor. Set the Regeneration Resistor Selection to 2.
P
Peter NicholsAug 30, 2025
Why Omron R88D-KN01H-ECT-R Servo Drives show Servo Drive Overheat?
- R
  robertwatkinsAug 30, 2025
  Omron Servo Drives may overheat if the temperature of the Servo Drive radiator or power elements exceeds the specified value. This can be caused by a high ambient temperature around the Servo Drive or an overload condition. To resolve this, improve the ambient temperature and cooling conditions of the Servo Drive. Additionally, consider increasing the capacities of the Servo Drive and the Servomotor, setting longer acceleration and deceleration times, and reducing the load.
M
Michael GordonAug 31, 2025
Why Omron R88D-KN01H-ECT-R Servo Drives show Encoder Communications Error?
- J
  Jeffrey Knight Jr.Aug 31, 2025
  Omron Servo Drives may display an Encoder Communications Error due to a data error, primarily caused by noise. This can occur even if the encoder cable is connected. To address this, ensure the encoder power supply voltage is within the required 5 VDC ±5% range, especially if the encoder cable is long. Separate the Servomotor cable and the encoder cable if they are bundled together. Connect the shield to FG.
B
Bobby JamesSep 23, 2025
What causes encoder communication disconnection error in Omron Servo Drives?
- A
  Anthony MaySep 23, 2025
  If you encounter an encoder communications disconnection error with Omron Servo Drives, it means a disconnection was detected because communications between the encoder and the Servo Drive were stopped more frequently than the specified value. To resolve this, wire the encoder correctly as shown in the wiring diagram and correct the connector pin connections.
N
Nathaniel AvilaSep 18, 2025
How to fix encoder communication error in Omron R88D-KN01H-ECT-R Servo Drives?
- S
  Steve WilliamsSep 18, 2025
  If you're experiencing an encoder communications error with your Omron Servo Drives, it's likely due to noise affecting the data from the encoder. To fix this, provide the required encoder power supply voltage 5 VDC ±5% (4.75 to 5.25 V), paying special attention when the encoder cable is long. If the Servomotor cable and the encoder cable are bundled together, separate them. Also, connect the shield to FG.
J
John SimsSep 18, 2025
What does excessive hybrid deviation error mean for Omron R88D-KN01H-ECT-R Servo Drives?
- J
  John Foster Jr.Sep 22, 2025
  If you're getting an excessive hybrid deviation error on your Omron Servo Drives, it means that during fully-closed control, the difference between the load position from the external encoder and the Servomotor position from the encoder was larger than the number of pulses set as the Hybrid Following Error Counter Overflow Level (3328 hex). Check the Servomotor and load connection. Check the external encoder and Servo Drive connection. When moving the load, check to see if the change in the Servomotor position (encoder feedback value) has the same sign as the change in the load position (external encoder feedback value).
E
ekaufmanSep 9, 2025
What to do if Omron R88D-KN01H-ECT-R are overloaded?
- A
  Ashley IrwinSep 10, 2025
  If you're encountering an overload with your Omron Servo Drives, it means the feedback value for torque command exceeds the overload level specified in the Overload Detection Level Setting (3512 hex). Check if torque (current) waveforms oscillate or excessively oscillate vertically during analog output or communications. Review the overload warning display and the load rate through communications. You can increase the capacities of the Servo Drive and the Servomotor, set longer acceleration and deceleration times, and reduce the load. Alternatively, try readjusting the gain.
W
William BonillaSep 7, 2025
What causes Overspeed in Omron R88D-KN01H-ECT-R Servo Drives?
- J
  Jennifer RamirezSep 7, 2025
  Overspeed in Omron Servo Drives occurs when the Servomotor rotation speed exceeds the value set on the Overspeed Detection Level Setting. This can be due to excessive speed commands, incorrect input frequency, dividing ratio, or multiplication ratio of the command pulse. If overshooting occurs due to faulty gain adjustment, adjust the gain. Ensure the encoder is wired correctly.

Summary

Terms and Conditions Agreement

Exclusive Warranty

Omron's warranty covers defects in materials and workmanship for twelve months from the date of sale.

Limitations

Omron disclaims warranties of non-infringement, merchantability, or fitness for a particular purpose.

Buyer Remedy

Omron's obligation is to replace, repair, or repay the purchase price of non-complying products.

Limitation on Liability; Etc

Omron Companies are not liable for special, indirect, incidental, or consequential damages.

Safety Precautions

Definition of Precautionary Information

Precautions describe important safety information that must be followed without fail.

Precautions for Safe Use

Precautions on what to do and what not to do to ensure using the product safely.

Precautions for Correct Use

Precautions on what to do and what not to do to ensure proper operation and performance.

Storage and Transportation

Guidelines for safely storing and transporting the Servo Drive and Servomotor.

Installation and Wiring

Precautions and guidelines for safely installing and wiring the Servo Drive.

Operation and Adjustment

Precautions for operating and adjusting the Servo Drive and its components.

Maintenance and Inspection

Precautions for performing maintenance and inspection on the Servo Drive.

Structure of This Document

Chapter 1 Features and System Configuration

Explains Servo Drive features, part names, and applicable EC Directives and UL standards.

Chapter 2 Models and External Dimensions

Chapter 3 Specifications

Chapter 4 System Design

Chapter 5 EtherCAT Communications

Chapter 6 Drive Profile

Chapter 7 Applied Functions

Chapter 8 Safety Function

Explains the Safe Torque OFF function with operation and connection examples.

Chapter 9 Details on Servo Parameter Objects

Chapter 10 Operation

Chapter 11 Adjustment Functions

Chapter 12 Troubleshooting and Maintenance

Describes items to check for problems, troubleshooting, and periodic maintenance.

Features and System Configuration

Models and External Dimensions

2-3 Model Tables

2-4 External and Mounting Dimensions

Specifications

3-1 Servo Drive Specifications

Provides general specifications, characteristics, and connector details for Servo Drives.

3-2 Overload Characteristics (Electronic Thermal Function)

3-3 Servomotor Specifications

Details general specifications, characteristics, and performance data for Servomotors.

3-4 Cable and Connector Specifications

System Design

4-1 Installation Conditions

Explains conditions for installing Servo Drives, Servomotors, and decelerators.

4-2 Wiring

Provides peripheral equipment connection examples and wiring diagrams.

4-3 Wiring Conforming to EMC Directives

Details requirements for EMC Directive conformance in wiring and panel design.

4-4 Regenerative Energy Absorption

EtherCAT Communications

5-1 Display Area and Settings

Drive Profile

6-1 Controlling the State Machine of the Servo Drive

Describes how the state of G5-series Servo Drives is controlled using Controlword and Statusword.

6-3 Cyclic Synchronous Position Mode

6-4 Torque Limit

6-5 Touch Probe Function (Latch Function)

6-6 Fully-closed Control

Details how external encoders are used for precise position control, unaffected by mechanical errors.

6-7 Object Dictionary

Applied Functions

7-1 Sequence I;O Signals

7-2 Forward and Reverse Drive Prohibition Functions

7-3 Overrun Protection

Detects Overrun Limit Errors and stops the Servomotor if it exceeds the allowable operating range.

7-4 Backlash Compensation

7-5 Brake Interlock

Sets output timing for the brake interlock (BKIR) when servo is ON, error occurs, or servo is OFF.

7-6 Electronic Gear Function

7-7 Torque Limit Switching

7-8 Gain Switching Function

Safety Function

8-1 Safe Torque OFF Function

Cuts off motor current and stops the motor via input signals from safety devices.

8-2 Operation Example

8-3 Connection Examples

Details on Servo Parameter Objects

9-1 Basic Settings

9-2 Gain Settings

Details gain adjustment procedures, including automatic and manual tuning methods.

9-3 Vibration Suppression Settings

Operation

10-1 Operational Procedure

Provides a step-by-step guide for checking motor and drive operation after installation and wiring.

10-2 Preparing for Operation

10-3 Trial Operation

Describes procedures for performing trial operation to confirm servo system correctness.

Adjustment Functions

11-2 Gain Adjustment

Explains gain adjustment using realtime autotuning and manual tuning methods.

11-3 Realtime Autotuning

11-4 Manual Tuning

11-6 Adaptive Filter

11-9 Friction Torque Compensation Function

11-11 Feed-forward Function

Troubleshooting and Maintenance

12-1 Troubleshooting

Explains preliminary checks and software for determining problem causes.

12-2 Warnings

12-3 Errors

Details error output (ALM), power circuit status, and error numbers displayed on the front panel.

12-4 Troubleshooting

Guides on determining error causes from displays and operation state, and taking measures.

12-5 Periodic Maintenance

Omron R88D-KN01H-ECT-R Specifications

General

Model	R88D-KN01H-ECT-R
Communication	EtherCAT
Feedback System	Incremental Encoder
Operating Temperature	0 to 55°C
Storage Temperature	-20 to 85°C
Humidity	90% RH or less (non-condensing)
Type	Servo Drive
Power Supply Voltage	200 to 240 VAC
Applicable Motor Capacity	0.1 kW
Series	R88D
Rated Output	50W
Input Voltage	3-phase 200 to 240 VAC
Protection Functions	Overcurrent, Overvoltage, Undervoltage
Vibration Resistance	4.9 m/s²
Shock Resistance	19.6 m/s²