230-046C

Access Machine Parameter Menu

Press MOD key, select 'Machine Parameters', navigate to MP7500-MP7599 Fast PLC Input parameters.

Use search function in parameter menu by typing MP75xx to quickly locate fast PLC parameters

Check Fast PLC Input Assignments

Review MP7500.x through MP7599.x parameters for any assigned fast PLC inputs and note the input numbers.

Document current settings before making changes - incorrect fast PLC configuration can affect machine safety functions

Examine IOC Configuration File

Access TNCopt menu, select 'PLC', then 'Configuration' to view IOC.SYS file and identify conflicting fast PLC input definitions.

Look for FAST_INPUT entries in IOC file that match the input numbers found in machine parameters

Remove Duplicate Definition

Delete either the IOC file entry or clear the machine parameter assignment (MP parameter takes priority). Restart TNC after modification.

Coordinate with machine builder or applications engineer before removing fast PLC definitions

Review Recent Parameter Changes

Check TNC event log (MOD > Diagnostics > Event Log) for recent changes to MP7500-MP7599 parameters.

Filter event log by 'Parameter' category to quickly identify recent MP changes

Compare IOC File Date

In TNCopt PLC Configuration menu, check IOC.SYS file timestamp against recent parameter modifications.

Backup current IOC file before making modifications

Update IOC File

Remove FAST_INPUT definitions from IOC.SYS file that conflict with newly assigned machine parameters.

Use TNCopt text editor to modify IOC file directly on the control

Validate Configuration

Perform TNC restart and verify alarm clears. Test fast PLC input functionality in MDI mode.

Test all safety-related fast inputs before returning machine to production

Check Software Version History

Access MOD > System Info to verify recent TNC software updates and compare with backup configuration dates.

Document current software version before proceeding with configuration changes

Review Backup Configuration Files

In TNCopt, examine backed up IOC files and machine parameters to identify which configuration method was originally used.

Ensure you have current backup before modifying system configuration

Standardize Configuration Method

Choose either IOC file or machine parameter method for fast PLC inputs and remove conflicting definitions from the other location.

Machine parameters (MP method) is generally preferred for newer TNC software versions

Review PLC Program Comments

Open PLC program in TNCopt and check comments for fast input usage and configuration notes.

Look for comment blocks that reference both IOC and MP configuration methods

Analyze Fast Input Usage

Search PLC program for FAST_INPUT references and correlate with both IOC file and machine parameter definitions.

Verify PLC program logic before removing any fast input definitions

Consolidate Configuration

Remove duplicate fast input definitions and update PLC program comments to reflect final configuration method used.

Use machine parameters for fast inputs when possible for easier maintenance