230-046E

Access IOC configuration

Navigate to MOD function → System Parameters → IOC Configuration to examine the current input/output assignments.

Always backup the IOC file before making changes using the TNC's backup function.

Identify conflicting entries

Search for axis group enable entries (typically labeled as AXIS_GROUP_ENABLE) and identify which axis group has multiple PLC input assignments.

Document all current assignments before modification to enable rollback if needed.

Remove duplicate assignments

Delete the redundant PLC input entries, keeping only one valid input per axis group, then save the IOC configuration.

Choose the PLC input that matches your actual hardware wiring configuration.

Restart control system

Perform a complete TNC restart to reload the modified IOC configuration and clear the alarm condition.

Access PLC program

Enter PLC mode via MOD function → PLC → Program to examine the ladder logic or structured text program.

Ensure machine is in a safe state before modifying PLC logic.

Analyze output assignments

Review PLC outputs that correspond to axis group enables and identify conflicting logic paths that could activate multiple outputs.

Use the TNC's cross-reference function to trace all uses of axis group enable outputs.

Modify PLC logic

Restructure the PLC program to ensure only one output per axis group is activated, using proper interlocking logic.

Implement mutex logic to prevent simultaneous activation of conflicting outputs.

Test and validate

Compile and download the modified PLC program, then test axis group enabling functionality to ensure proper operation.

Review wiring documentation

Examine electrical schematics and IOC assignments to identify which PLC inputs should be connected to axis group enable signals.

Always use lockout/tagout procedures before working on electrical connections.

Verify physical connections

Check terminal blocks and connectors to ensure only one PLC input per axis group is physically wired to the enable circuit.

Use a multimeter to trace signal paths and identify unintended parallel connections.

Correct wiring issues

Remove redundant connections and ensure proper single-point wiring for each axis group enable function.

Verify voltage levels and signal types match TNC input specifications before reconnecting.

Update IOC if necessary

Modify IOC configuration to match the corrected wiring if input terminal assignments have changed.

Backup current configuration

Create a backup of the current IOC file using MOD → Data Management → Backup before attempting restoration.

Save backup to external media to prevent loss during restoration process.

Restore known good configuration

Load a previously saved IOC configuration file that was known to work correctly without this alarm condition.

Ensure the backup configuration matches your current hardware setup to avoid new conflicts.

Verify configuration integrity

Review the restored IOC file for proper syntax and single input assignments per axis group using the TNC's configuration checker.

Use the TNC's built-in validation tools to check for configuration errors before activation.

Test system functionality

Perform a complete system restart and test all axis group enable functions to ensure proper operation.