230-01CD

Access machine parameters

Navigate to MOD > Machine Parameters > Axis-specific parameters for the affected axis shown in %2.

Use PLC > Info > Axis assignment to verify which physical axis corresponds to %2

Check speedEncoderInput parameter

Locate MP7500 speedEncoderInput parameter and verify the assigned X-connector matches the required pairing (X15-X51, X16-X52, etc.).

Document current settings before making changes

Correct connector assignment

Change speedEncoderInput to match the corresponding pwmSignalOutput connector using the fixed pairing table.

Cross-reference with electrical drawings to ensure physical wiring matches parameter settings

Restart control

Perform a complete TNC restart to activate the new parameter settings and clear the alarm.

Ensure all programs are saved before restart

Navigate to PWM parameters

Access MOD > Machine Parameters > Axis-specific parameters and locate MP7400 series pwmSignalOutput parameter.

Use the parameter search function (GOTO) to quickly find MP7400

Verify current PWM assignment

Check the current pwmSignalOutput connector assignment and compare with the speedEncoderInput parameter value.

Note the axis amplifier connections before changing PWM assignments

Correct PWM connector pairing

Modify pwmSignalOutput to match the fixed pairing requirement (X51 for X15, X52 for X16, etc.).

Verify amplifier enable signals are also correctly assigned to prevent additional alarms

Validate parameter consistency

Cross-check both speedEncoderInput and pwmSignalOutput parameters ensure they form a valid pair from the permitted combinations.

Incorrect PWM assignment can damage servo amplifiers

Verify CC control card type

Check PLC > Info > Hardware configuration to confirm CC 424 or CC 61xx card type and firmware version.

Compare with machine documentation to ensure correct control card is installed

Review parameter backup

Load the pre-upgrade machine parameter backup and compare speedEncoderInput/pwmSignalOutput assignments with current values.

Don't restore entire parameter set without validating hardware compatibility

Reconfigure connector assignments

Update both MP7500 speedEncoderInput and MP7400 pwmSignalOutput parameters to match the physical wiring and CC card requirements.

Use the TNC's parameter comparison function to identify all changed values

Test axis functionality

Perform controlled axis movement tests to verify proper encoder feedback and PWM output operation after parameter correction.

Start with reduced feed rates and monitor for servo following errors

Check parameter integrity

Navigate to PLC > Diagnosis > Parameter check to scan for corrupted or out-of-range machine parameter values.

Look for parameters showing unusual values or question marks indicating corruption

Reset affected axis parameters

Clear the corrupted speedEncoderInput and pwmSignalOutput parameters and manually re-enter correct values from machine documentation.

Only reset specific parameters, not entire axis configuration

Validate connector pairing

Ensure the restored parameters follow the mandatory CC control card pairing (X15-X51, X16-X52, X17-X53, etc.).

Create a parameter backup immediately after successful configuration

Perform system validation

Execute a complete TNC self-test and verify all axis parameters are within acceptable ranges and properly paired.

Monitor system for additional parameter-related alarms during validation