KUKA KSS00024 EtherCAT Communication Error – Causes, Symptoms & How to Fix

Error Code Overview

Error Code: KSS00024
Category: Bus / Communication / EtherCAT / Module
Severity: High
System: KRC Controller / KSP/KPP Servo Drives / X20 I/O / EtherCAT Network
Impact: Robot motion stops; EtherCAT network communication lost; drives and I/O may be affected

Quick Fix for KUKA KSS00024

If KUKA KSS00024 EtherCAT Communication Error appears, take these immediate actions:

1. Stop all robot motion immediately
2. Inspect EtherCAT cables and connectors for damage
3. Check that all connected modules are powered and online
4. Verify EtherCAT settings in SmartHMI or WorkVisual
5. Reset the alarm and restart the controller

Important: Temporary communication interruptions may clear after restart, but repeated KSS00024 alarms usually indicate wiring, module, or network faults.

What Does KUKA KSS00024 Mean?

KUKA KSS00024 indicates that the KRC controller has lost communication with one or more deviceson the robot’s EtherCAT-based communication network.

Affected components may include:

• Servo drives (KSP/KPP)
• X20 I/O modules
• Safety modules
• RDC / feedback modules
• Other EtherCAT-enabled devices

In simple terms: The controller cannot reliably exchange data with deviceson the EtherCAT network, so robot motion is stopped until communication is restored.

Common Symptoms of KSS00024

When th is error occurs, operators may notice:

• Robot stops during startup or operation
• Servo drives remain disabled
• I/O modules appear offline
• Communication LEDs flash red/yellow
• SmartHMI shows module timeout or offline warnings

These symptoms usually indicate EtherCAT network instability or hardware failure.

Main Causes of KUKA KSS00024

1. EtherCAT Cable or Connector Damage

Physical cable problems may interrupt communication:

• Broken or worn cable
• Loose connector
• Bent or damaged pins

Cable faults are among the most common causes.

2. Network Topology Interruption

If one node in the communication chain fails:

• Downstream devices may lose synchronization
• Multiple modules may appear offline simultaneously

Th is often occurs when one failed device disrupts the full network loop.

3. Faulty EtherCAT Module

A malfunctioning hardware module may stop responding:

• Failed KSP/KPP drive
• Faulty X20 I/O module
• RDC communication loss
• Safety module malfunction

4. Configuration or Addressing Error

Improper setup may cause communication mismatch:

• Incorrect device addressing
• WorkVisual configuration mismatch
• Firmware incompatibility

5. EMI / Grounding Interference

Electrical interference can corrupt EtherCAT signals:

• Poor shielding
• Improper grounding
• High-current devices near communication cables

How to Troubleshoot KUKA KSS00024

Step 1 – Identify the Faulted Module

Use SmartHMI diagnostics to determine:

• Which EtherCAT device is offline
• Whether one or multiple nodes are affected

Step 2 – Inspect EtherCAT Wiring

Check:

• Cable integrity
• Connector seating
• Shielding condition
• Bent/damaged pins

Reconnect and reseat all cables.

Step 3 – Test Module Hardware

Power cycle all affected devices and verify:

• Status LEDs
• Startup behavior
• Communication response

Replace faulty modules if needed.

Step 4 – Verify Configuration Settings

Confirm:

• Network topology matches configuration
• Device addresses are correct
• Firmware is compatible

Step 5 – Check Power Supply and Grounding

Inspect:

• Stable voltage supply
• Grounding continuity
• Shield termination
• EMI sources near network cabling

Step 6 – Reset and Retest

After repairs:

1. Clear KSS00024 in SmartHMI
2. Restart the controller
3. Jog axes slowly
4. Monitor communication stability

Recommended Replacement Parts

Pro Diagnostic Tip

If KSS00024 occurs intermittently, monitor the robot during movement.

Movement-triggered EtherCAT faults often indicate:

• Internal cable fatigue
• Broken wires inside drag chains
• Connector vibration issues

Many intermittent EtherCAT faults only appear when cables flex during robot motion.

How to Fix KUKA KSS00024

Dependingon the cause:

• Replace damaged EtherCAT cables
• Repair/replace faulty modules
• Correct network configuration
• Restore proper grounding/shielding
• Eliminate EMI interference

How to Prevent EtherCAT Communication Errors

To reduce recurrence:

• Inspect EtherCAT cables regularly
• Maintain proper shielding and grounding
• Verify configuration after hardware changes
• Keep communication cables separated from power lines
• Stock spare modules and cables onsite

Related Errors

• KUKA KSS00021 Bus Communication Error– Controller loses communication with bus modules.
  
• KUKA KSS00022 Fieldbus Communication Error – Fieldbus network failure.
  
• KUKA KSS00023 Profinet Communication Error – Profinet network module offline.
  
• KUKA KSS00410 X20 I/O Communication Error – X20 module not responding.
  
• KUKA KSS01407 Fieldbus Communication Error – Controller detects timeout or bus failure.

These alarms are closely related to robot communication networks, bus stability, and device connectivity.

FAQ

Can the robot operate with KSS00024 error?

No. Robot motion is blocked until EtherCAT communication is restored.

Why does KSS00024 occur?

• Damaged or loose EtherCAT cables
• Faulty KSP/KPP drives or X20 I/O modules
• Network misconfiguration or termination issues
• Electrical noise affecting communication

How can I fix KUKA KSS00024 quickly?

• Inspect and repair cables and connectors
• Replace faulty modules
• Verify EtherCAT network settings
• Reset SmartHMI and test operation

Can repeated EtherCAT failures damage the robot?

Yes. Persistent communication errors may lead to unexpected stops, overloads, or module damage.