März 20, 2026 Daniel Kovac

ABB Robot Error 40204 – Drive Overcurrent: Causes and Fix

⚠️ Quick Fix for ABB Error 40204

If a drive overcurrent fault occurs, try these immediate steps:

Stop the robot immediately to prevent hardware damage
Check for mechanical resistance or axis jamming
Inspect servo drives and motor cables
Restart the ABB IRC5 Controller using FlexPendant after inspection

These steps often help quickly identify whether the issue is mechanical or electrical.

ABB Robot Error 40204 – Drive Overcurrent occurs when the ABB IRC5 Controller detects excessive current in a servo drive. This condition can damage motors, drives, or wiring if not addressed promptly, so the system automatically stops motion.

Understanding the root cause is critical to restoring safe operation and avoiding repeated faults.

What Does ABB Error 40204 Mean?

Error 40204 indicates that a servo drive is drawing more current than expected, often due to mechanical resistance, overload, or electrical faults.

Affected components may include:

Servo drives
Robot motors (axes)
Motor power cables
Mechanical transmission (gears, joints)

Common Causes of ABB Error 40204

Mechanical Jam or Resistance

Axis blockage, gearbox issues, or external interference can lead to excessive current spikes, triggering overcurrent faults.
Common issues include:

1. Stiff or obstructed robot joints
2. Gearbox misalignment or internal damage
3. Foreign objects causing resistance

Regular maintenance of mechanical components, including joints and gearboxes, prevents stiffness or blockages that may result in overcurrent faults.

Excessive Load

When the robot carries a payload that exceeds its rated capacity, motors and servo drives are strained, causing an abnormal current draw.
Common issues include:

1. Overloaded end effectors or tooling
2. Workpieces exceeding the robot’s payload specifications
3. Incorrect configuration of the payload parameters in the controller

Ensure that the payload remains within the robot’s specified limits and adjust motion parameters for safe operation.

Motor or Cable Fault

Short circuits or insulation damage in motor cables can trigger overcurrent.

Servo Drive Failure

Internal faults in the drive module may cause abnormal current behavior.

How to Troubleshoot ABB Error 40204

Step 1: Check Mechanical Movement

Manually inspect robot axes for stiffness or blockage
Remove any external obstruction

Step 2: Verify Load Conditions

Ensure payload is within rated limits
Reduce speed or acceleration if necessary

Step 3: Inspect Motor and Cables

Check motor power cables for damage or overheating
Look for signs of short circuits

Step 4: Inspect Servo Drives

Check drive modules for fault indicators
Replace faulty drives if abnormal current persists

Step 5: Reset Controller

After resolving the issue:

Reset the alarm using FlexPendant
Restart the ABB IRC5 Controller
Run low-speed test motion
Monitor current levels

Related Components That May Be Affected

Servo drives
Robot motors
Motor power cables
Mechanical joints and gear systems

When Should You Replace Components?

Replacement is recommended if:

Servo drives repeatedly trigger overcurrent faults
Motor cables show insulation damage or overheating
Motors exhibit abnormal noise, vibration, or heat

Preventing Drive Overcurrent Errors

Keep payload within robot specifications
Regularly inspect mechanical joints and gearboxes
Maintain motor cables and connections
Avoid sudden high acceleration or shock loads
Use ABB RobotStudio to monitor current and load trends

Related ABB Robot Error Codes

ABB Error 40223 – Motor Overload
ABB Error 40212 – Motor Overtemperature
ABB Error 50056 – Drive System Fault
ABB Error 40212 – Motor Overtemperature
ABB Error 40205 – Drive Undervoltage
ABB Error 10014 – Motion Supervision Triggered
ABB Error 50056 – Drive System Error
ABB Error 10020 – Encoder Signal Lost

Understanding these related faults can help identify underlying mechanical or electrical issues. For a complete list of ABB robot error codes and troubleshooting solutions, refer to our full ABB error code guide.

Recommended Parts for ABB Error 40204

Conclusion
ABB Robot Error 40204 – Drive Overcurrent occurs when excessive current is detected in a servo drive. Common causes include mechanical resistance, overload, motor cable faults, or drive failure.
By inspecting mechanical systems, verifying load conditions, and checking drives and cables, engineers can restore stable operation and prevent hardware damage.
ABB Robot Error 40204: Overcurrent Troubleshooting FAQ
1. What causes ABB Error 40204?
This error is typically caused by mechanical jams, excessive load, motor cable faults, or servo drive failure.
2. How do I fix Error 40204?
Check mechanical movement, reduce load, inspect motor cables and drives, and reset the controller.
3. Can a mechanical jam trigger overcurrent?
Yes, blocked or stiff robot axes can cause sudden current spikes in the servo drive.
4. When should I replace servo drives or motors?
Replace if overcurrent faults occur repeatedly or if components show signs of overheating or damage.