1C7-0208

Access Safety Configuration

Enter MOD function, navigate to Safety Configuration menu. Review the SS2 deceleration parameters for each axis (typically found under SafeMotion > SS2 Parameters).

Safety parameter changes require proper authorization and may necessitate re-validation of the safety function. Document all original values before making changes.

Compare Deceleration Values

Cross-reference the SS2 deceleration values with the standard axis deceleration parameters in the machine parameters (CfgAxisDecel tables). The safety deceleration should account for worst-case conditions.

The SS2 deceleration value should typically be 10-20% lower than the actual achievable deceleration to provide safety margin and account for varying load conditions.

Verify Maximum Path Setting

Check the maximum path parameter for SS2 (typically MaxPathSS2 or similar designation). Calculate if this value is realistic: MaxPath = (Velocity²)/(2 × Deceleration) + safety margins.

Include reaction time delays (typically 200-500ms) in your calculations. The TNC adds this delay to account for safety system response time.

Adjust Parameters if Authorized

If authorized and after consultation with machine builder, increase the MaxPathSS2 parameter or adjust deceleration values to match actual machine performance. Save configuration and reset safety module.

Any modification to safety parameters must be validated according to ISO 13849 or IEC 62061 requirements. Improper changes can compromise machine safety certification.

Perform Mechanical Inspection

Check brake systems, mechanical brakes on motors, ball screws, and linear guides for wear, contamination, or damage that could reduce braking effectiveness.

Disable machine power and follow lockout/tagout procedures before inspecting mechanical components.

Test Actual Deceleration

Use TNC trace function (TRACE > Configure) to record actual axis deceleration during normal stops. Compare measured values against configured safety deceleration parameters.

Set up trace to capture axis position and velocity at high sample rate (≥10ms). Trigger trace during several stop sequences to identify inconsistent braking performance.

Check Servo Drive Parameters

Review axis servo tuning parameters (Kv factors, current limits, velocity loop gains) to ensure they haven't drifted from optimal settings. Check for any axis parameter changes since last successful operation.

Access axis diagnostics via MOD > Axis > Diagnostics to check for following errors or servo warnings that might indicate degraded servo performance.

Inspect Axis Load Conditions

Verify that machine configuration hasn't changed (additional fixtures, heavier tooling, modified workpiece handling) that would increase moving mass and reduce deceleration capability.

If machine configuration has changed, the safety parameters may need to be recalculated based on the new mass/inertia values and re-validated by a qualified safety engineer.

Export Current Configurations

Use TNC file management to backup both standard machine parameters (MP tables) and safety configuration. Navigate to MOD > Data Export/Import to save current configurations for comparison.

Save files with date-stamped names to USB drive. Compare against machine manufacturer's original configuration files if available.

Compare Axis Resolution Parameters

Verify that encoder resolution and position scaling factors match between standard configuration and safety module. Check MP100-107 (axis designation and resolution) against SafeMotion encoder configuration.

Mismatched resolution parameters cause the safety system to calculate incorrect distances. Even small discrepancies accumulate into path monitoring violations.