KUKA KR C4 Smallsize-2 Debugging Guide

Fault 4: The enable switch is invalid. The smartPAD enable switch has three positions: not pressed, middle position, and panic position. Only the middle position can be moved under T1/T2. If an external enable switch is connected, X11 pins 11/12, 29/30 and 13/14, 31/32 need to be wired correctly; Short circuit is required when not in use. Two enable switches should be kept in the middle position for no more than 15 seconds at the same time, otherwise a safety stop 1 will be triggered.

Fault 5: T1 speed monitoring alarm. Check program magnification, manual magnification, tool load, and motion commands. The installation speed of the flange under T1 must not exceed 250 mm/s, otherwise the safety stop 0 will be triggered. If the process requires higher speed, T2 should be used and personnel should be kept outside the danger zone.

Fault 6: RDC or mastering malfunction. Check X21 data cable, shielding, plug locking, RDC power supply, and EDS. After replacing the data cable, it is necessary to re master. If the axis data is lost, check the battery, RDC, and motor encoder wires. Mastering testing can use EMD or reference switches.

Fault 7: Over temperature or fan alarm. Check the spacing between the top, sides, and rear of the cabinet; Clean the heat exchanger, fan, and radiator; Check the KPP_SR/KSP_SR radiator, brake resistor, and temperature sensor inside the cabinet. Do not install filter cotton outside the ventilation port, otherwise it will increase the temperature and shorten the service life of the equipment.

Fault 8: The safety stop cannot be cancelled. Check external safety stop 1/2, safe operation stop US2、 Enable signal, operational safety, and safety interface feedback. Security stop cancellation usually does not require confirmation, but operational security recovery requires confirmation. If the safety controller detects an error, it may trigger the safety stop 0, and diagnostic information needs to be checked.

Fault 9: Abnormal load voltage of USS 2. Check if the Q5/Q6 contactors, fuses on CCU_SR, and US1/US2 are cross connected. If USS 2 cannot be turned off, it may cause unexpected actions of the actuator. It is necessary to confirm the contactor's suction and disconnection status according to the US2 functional inspection process.

Fault 10: Communication interruption. Check the connections of KCB, KSB, and KEB devices, WorkVisual configuration, bus terminal resistance, and shield grounding. If the device is not reconfigured after replacement, the system may not recognize the new device. When the secure communication is interrupted, the discrete secure interface will trigger the overall system E-STOP, while the Ethernet secure interface may generate a signal from the KUKA security controller to prevent the upper controller from triggering the overall E-STOP. However, the system integrator must consider this behavior in the risk assessment.

Maintenance and Support: Making Small Controllers Long Term Verifiable

Maintenance work must be carried out outside the danger zone; If entry is necessary, power must be cut off, tags must be hung, and electricity must be tested. After the controller is powered off, there may still be a residual voltage of up to 780 VDC in the intermediate circuit, and it is necessary to wait for at least 180 seconds. Follow ESD regulations during homework to prevent static electricity from damaging the board. Regularly inspect batteries, fans, contactors, fuses, labels, and warning signs. Nameplates, warning labels, and safety symbols shall not be removed or altered. Passwords should be changed before debugging and only authorized personnel should be informed.

When support is required, the robot model and serial number, controller model and serial number, energy supply system model and serial number, system software version, other software component versions, diagnostic package KRCDiag, application project, and external axis information should be prepared. The more complete the information, the faster the positioning.

The assembly and debugging of KR C4 smallsize-2 is essentially a systematic verification of the power chain, communication chain, and safety chain. Neglecting any of the following factors, such as installation spacing, grounding, battery, X11/X13/X66 safety interfaces, X20 motor interface, X21 RDC and US2, WorkVisual configuration, may result in shutdown, alarm, or more serious safety risks in automatic mode. For engineers, the most effective method is not to "power on first", but to confirm equipment compatibility, wiring correctness, safety function effectiveness, and data consistency layer by layer based on module replacement and fault tree logic. Only in this way can small controllers operate stably for a long time in compact workstations.