KRC0103

Common Causes

• Excessive CPU load from complex KRL programs with heavy mathematical calculations or nested loops executing within the interpolation cycle
• PROFIBUS or EthernetIP fieldbus communication delays or timeouts causing cycle time overruns in the real-time task
• Defective or failing KPP (KUKA Power Pack) communication causing CAN bus timing violations between KRC and servo drives
• Corrupted or oversized system files in C:\KRC\ROBOTER\STEU or excessive logging activity consuming real-time resources
• Hardware failure of the Industrial PC mainboard, failing CPU cooling system, or degraded RAM modules affecting real-time performance

Troubleshooting Steps

1. 1Step 1: Acknowledge alarm and check KRL program for heavy computation blocks, especially within INTERRUPT or BAS routines that execute in cycle time
2. 2Step 2: Navigate to Service > Log Book and check for concurrent alarms related to fieldbus communication, drive communication, or safety system timing
3. 3Step 3: Monitor real-time diagnostics via Diagnosis > Real-time Information to observe actual cycle times and identify which task is exceeding limits
4. 4Step 4: Check PROFIBUS or EthernetIP configuration in WorkVisual for incorrect baud rates, excessive slave count, or improperly configured DP-V2 cyclic data
5. 5Step 5: Verify KPP communication by checking X11 connector integrity and observing LED patterns on drive modules, test CAN bus termination resistors at both ends
6. 6Step 6: If issue persists, perform IPC diagnostics using KUKA.Diag tool, check Windows Task Manager for non-KUKA processes consuming resources, escalate for IPC hardware replacement or image restoration