6030

Access Diagnostics menu via HMI and navigate to System Information > Memory Status to verify actual installed DRAM, DPRAM, and SRAM quantities.

In NCK Parameters menu, check current values of MD 18210, MD 18220, and MD 18230 against the physical memory detected.

If mismatch exists, allow the system to auto-adapt the MD values during startup or manually correct them via Machine Data editor and save using NEWCONF button.

Do not manually set these MDs to arbitrary values; use detected physical memory quantities only.

Perform a warm restart (cycle power OFF/ON) to reinitialize memory detection and clear the alarm.

Power down the control completely and verify all memory module connectors (typically located on NCK processor board) are firmly seated with no corrosion or bent pins.

Ensure all power supplies are discharged before servicing internal hardware.

Visually inspect DRAM, DPRAM, and SRAM modules for physical damage, burn marks, or discoloration indicating hardware failure.

If a module is defective or missing, replace it with the correct memory type per the 840D control specification sheet, then restore appropriate MD values.

Use only Siemens-approved memory modules to avoid incompatibility and data corruption.

Power up and verify alarm 6030 clears after memory detection cycle completes.

In NCK menu, export current machine data to external storage via Automation > Machine Data > Export as backup reference.

Verify against a known-good machine data backup from an identical 840D configuration; compare MD 18210, MD 18220, MD 18230 values to ensure they reflect true physical memory.

Do not restore entire machine data from untrusted sources without validation.

If values are incorrect, manually edit MDs to match installed memory quantities, save changes, and press NEWCONF to commit configuration.

Perform full control restart and monitor Diagnostics > System Log for repeated memory adaptation messages indicating continued mismatch.