10604

Check Drive LED Status

Examine SINAMICS drive module LEDs - red LED indicates fault condition, yellow indicates not ready state.

Ensure EMERGENCY STOP is active before accessing drive cabinet

Access SINAMICS Diagnostics

Navigate to Diagnostics > Drive Diagnosis in HMI, check fault buffer for specific drive fault codes (F-codes) or alarms (A-codes).

F30001 (Infeed fault) and F30005 (Motor overtemperature) are common causes

Verify Drive Power Supply

Check 24VDC control voltage and main power supply voltages to SINAMICS units using multimeter at X122 terminals.

Use proper PPE and lockout procedures when measuring voltages

Reset Drive Faults

Use STARTER software or HMI Diagnostics menu to acknowledge and reset drive faults, then attempt servo enable.

Some faults require power cycle of drive unit after acknowledgment

Check Bus Communication Status

Navigate to Diagnostics > PLC > Module Information, verify PROFIBUS/PROFINET status shows all drive nodes as 'RUN' state.

Red X indicates communication loss, yellow triangle shows configuration mismatch

Verify Physical Bus Connections

Inspect PROFIBUS/PROFINET cables at NCK X126 connector and drive X120 connectors for loose connections or damage.

Do not disconnect bus cables while system is powered

Check Bus Termination

Verify PROFIBUS terminating resistors are installed only at first and last nodes, or PROFINET switch ports are properly configured.

Use PROFIBUS tester or network analyzer to verify signal quality and termination

Validate Drive Addressing

Confirm PROFIBUS node addresses match MD30130 (CTRLOUT_MODULE_NR) settings in NCK machine data.

Use HW Config in SIMATIC Manager to verify configured vs. actual addresses

Verify Drive Machine Data

Check MD30130 (CTRLOUT_MODULE_NR) and MD30131 (CTRLOUT_MODULE_TYPE) match actual SINAMICS configuration for each axis.

Use Commissioning > Machine Data > Drive Parameters to access these settings

Check Drive Ready Timeout

Examine MD11210 (DRIVE_READY_TIMEOUT) - increase value if drives need more time to reach ready state after enable.

Default 5000ms may be insufficient for large servo motors or complex drive configurations

Validate Axis Assignment

Verify MD30100 (CTRLOUT_TYPE) and MD30110 (CTRLOUT_SEGMENT_NR) correctly map NCK axes to physical drive channels.

Incorrect axis mapping can cause cross-axis interference and drive conflicts

Reset NCK Configuration

Perform NCK reset via HMI Startup menu after machine data changes, then restart system to apply new drive configuration.

Use 'Reset NCK' rather than full system restart to preserve PLC program

Check Motor Power Connections

Inspect motor power cable connections at drive output terminals U, V, W and motor terminal box for loose or corroded connections.

Verify motor power is isolated before checking connections

Verify Encoder Feedback

Check encoder cable connections at drive X101 connector and motor encoder housing, look for bent pins or cable damage.

Use STARTER to monitor encoder signals - should show clean sine/cosine or incremental pulses

Test Motor Holding Brake

Verify 24VDC brake supply voltage and check brake coil resistance (typically 50-200 ohms) using multimeter.

Brake fault can prevent drive ready even if motor feedback is correct

Perform Drive Commissioning

Use STARTER software to run automatic motor identification and encoder adjustment if connections are verified.

Ensure axis can move freely before running motor identification routine

Check STO Circuit Status

Verify 24VDC present at SINAMICS STO inputs (terminals 1-4 on X21/X22 connectors) using multimeter.

STO circuits are safety-related - follow proper safety procedures

Verify Safety Input Configuration

Check F-DI configuration in STARTER software matches actual safety circuit wiring and acknowledge any safety-related fault messages.

F01611 (STO active) is common when safety circuits are not properly reset

Reset Safety System

Cycle EMERGENCY STOP circuit and verify all safety gates/interlocks are closed before attempting servo enable.

Some safety systems require specific reset sequence - consult machine safety documentation