KUKA KRC4 Robot Controller
21 fault codes documented
General error
This return value from the OR_PATH_REPLAY() function indicates an unspecified or general error occurred during path replay. The exact root cause is not immediately apparent and requires further investigation into the robot's state and the OR_PATH_REPLAY() call parameters. This error prevents the path from being replayed.
Specified path not found
This return value from the OR_PATH_REPLAY() function indicates that the path identified by the provided PATHID could not be located on the Compute Box. This prevents the KUKA KRC4 robot from executing the requested path, as the path data is inaccessible.
Specified path is empty
This return value from the OR_PATH_REPLAY() function signifies that the path identified by the PATHID exists on the Compute Box but contains no valid movement data. This prevents the KUKA KRC4 robot from replaying any motion, as there is no path to follow.
Unable to open specified path file
This return value from the OR_PATH_REPLAY() function indicates that the system encountered an error when trying to open or access the path file associated with the given PATHID on the Compute Box. This could be due to file system issues, permissions, or corruption, preventing the path data from being read by the KUKA KRC4 controller.
Path completed
This return value from the OR_PATH_REPLAY() function indicates that the programmed path execution was successful. It signifies a normal and successful operation rather than a fault, meaning the robot has finished moving along the defined path.
Overcurrent, KPP/KSP (axis)
A fault that briefly results in an overcurrent exceeding the maximum current of the KUKA KRC4 KPP. This is typically caused by a sudden short-circuit or an instantaneous heavy load.
Intermediate circuit voltage too high, KPP/KSP (axis)
An overvoltage condition in the intermediate circuit of the KUKA KRC4 KPP/KSP during operation. This often occurs due to excessive regenerative braking energy, high incoming mains voltage, or a malfunction in the braking system.
Intermediate circuit voltage too low, KPP/KSP (axis)
An undervoltage condition in the intermediate circuit of the KUKA KRC4 KPP/KSP during operation. This indicates insufficient power supply to the DC link or an issue with its charging circuit, preventing the drive from maintaining adequate operating voltage.
Unknown status flag received, KPP/KSP (axis)
Software error within the EtherCat master. The KUKA KRC4 KPP/KSP device received an unrecognized status flag from the EtherCat master. This indicates a communication issue at the protocol level.
Unknown device status, KPP/KSP (axis)
The KUKA KRC4 KPP/KSP device reported an unknown or invalid operational status. This indicates a breakdown in the expected state reporting from the drive axis module.
Hardware fault, KPP/KSP (axis)
The KUKA KRC4 KPP/KSP device has detected an internal hardware fault. This signifies a component failure within the KPP/KSP module itself, preventing proper operation.
Mains phase failure, KPP/KSP (axis)
Failure of one or more mains phases supplying the KUKA KRC4 KPP/KSP device. This can lead to insufficient power, improper operation, or damage to the drive.
Internal error, KPP/KSP (axis)
The KUKA KRC4 KPP/KSP device has detected an internal error, indicating a malfunction within the module itself, possibly a software or firmware issue.
Device temperature too high, KPP/KSP (axis) Overtemperature
Overtemperature detected in the KPP/KSP device or related axis components of the KUKA KR C4/KR C4 CK controller. This indicates elevated operational temperature within the drive or its environment, which can lead to thermal shutdown or reduced component lifespan.
Heat sink temperature too high, KPP/KSP (axis) Overtemperature
Overtemperature detected specifically on the heat sink of the KPP/KSP device or associated axis in the KUKA KR C4/KR C4 CK controller. This indicates inadequate heat dissipation from critical power components, which can lead to component damage if not addressed.
Motor phase failure, KPP/KSP (axis)
Detection of a failure in one or more motor phases connected to the KPP/KSP axis drive in the KUKA KR C4/KR C4 CK controller. This indicates an open circuit, short circuit, or high resistance in the motor power path, leading to uncontrolled motor movement or inability to operate the axis.
Communication error, KPP/KSP (axis)
An error occurred in the communication on the controller bus, specifically between the KPP/KSP axis drive and the KUKA KR C4/KR C4 CK controller. This communication interruption can prevent proper axis control, status updates, and overall robot operation.
Unknown status flag received, KPP/KSP (axis)
The EtherCAT master within the KUKA KR C4/KR C4 CK controller received an unknown or unexpected status flag from the KPP/KSP axis device. This indicates a potential software error, firmware inconsistency, or corrupted data during EtherCAT communication, leading to an uninterpretable device state.
Unknown device status, KPP/KSP (axis)
The KPP/KSP axis device within the KUKA KR C4/KR C4 CK controller is reporting an unknown or undefined status. This indicates an internal issue where the device is in an uninterpretable state, preventing the controller from correctly assessing its operational condition.
Hardware fault, KPP/KSP (axis)
The KPP/KSP axis device within the KUKA KR C4/KR C4 CK controller has detected an internal hardware fault. This is a critical error indicating a component failure within the module itself, requiring immediate attention.
Mains phase failure, KPP/KSP (axis)
Detection of a failure in one or more of the incoming mains phases supplied to the KPP/KSP axis drive in the KUKA KR C4/KR C4 CK controller. This can lead to an imbalanced power supply to the drive or complete loss of power for the affected module.