235-00AF

Access system configuration mode

Power up the control while holding the MOD key to enter Service/Manufacturing mode. Navigate to MOD → System → Configuration → HSCI Components.

Entering MOD functions requires manufacturer or service-level password. Document existing settings before making changes.

Review current HSCI topology

View the detected devices list showing all components found on HSCI bus. Note the device address (00AF indicates address position) of the unexpected inverter module.

The alarm code suffix (00AF) typically indicates the HSCI address or position where the extra device was detected.

Update SIK configuration file

Edit the SIK5.SYS (or machine-specific SIK file) to add the inverter module definition at the correct address position with proper component type designation (e.g., UM1x4 or UM1x8 depending on model).

Always create a backup of the original SIK file before editing. Save to USB using TNC → File Management → Backup function.

Reload configuration and restart

After saving the updated SIK file, execute a full control restart (power cycle). The control will re-read the configuration and verify the HSCI topology matches the new SIK definition.

Complete restart required - use controlled shutdown procedure to avoid data loss.

Power down and inspect physical addresses

Shut down the machine completely. Physically inspect each UM inverter module's address setting using the rotary switch or DIP switch configuration (location varies by UM model - typically on front panel or side).

Ensure main power is disconnected and LVPS (Low Voltage Power Supply) is de-energized before opening cabinet.

Document and verify address scheme

Create a table of all HSCI devices with their physical addresses. Compare against the SIK configuration file to ensure unique addresses from 0-15 (or higher depending on control version) with no duplicates.

Use sequential addressing starting from 0 for inverters, leaving gaps for future expansion. Typical scheme: 0-7 for inverters, 8+ for I/O modules.

Correct duplicate address assignment

Change the rotary/DIP switch on one of the conflicting inverters to an unused address. Ensure this new address matches the device's definition in the SIK configuration file.

After changing address switches, allow 10 seconds before power-up for the module's internal logic to stabilize.

Verify bus termination and restart

Confirm HSCI bus termination resistors (typically 120 Ohm) are installed only at the first and last device in the chain. Power up and verify alarm clears.

Improper termination can cause intermittent communication errors and false device detection.

Review machine modification history

Check maintenance logs or consult with machine tool builder regarding any recent inverter module removals or HSCI component changes. Access control's log file via TNC → MOD → System → Log to review hardware change timestamps.

Heidenhain controls maintain a component change log accessible through PLC → Monitor → Component Status.

Audit SIK file against physical installation

Open the active SIK file (visible in MOD → System → Configuration → Active Files) and verify every inverter definition corresponds to a physically installed module. Remove definitions for absent hardware.

Incorrect SIK modifications can prevent control startup. Always backup existing configuration before editing system files.

Update configuration and renumber if needed

After removing obsolete inverter definitions from SIK file, renumber remaining HSCI addresses sequentially to eliminate gaps. Update physical address switches on modules to match new scheme.

Sequential addressing without gaps improves HSCI bus scan time and simplifies future diagnostics.