What causes Siemens SINUMERIK alarm 4036?

Interpolation cycle mismatch between NCUs in LINK group without FAST-IPO-LINK enabled. Position control cycle parameters differ across linked NCUs. MD $MN_MM_NCU_LINK_MASK FAST-IPO-LINK function not activated when required. Inconsistent machine data synchronization between NCU nodes in multi-axis configuration. Incorrect NCU LINK group configuration after system upgrade or parameter reset.

How do I fix Siemens SINUMERIK alarm 4036?

1. Verify all NCUs in the LINK group have identical interpolation cycle settings via HMI machine data editor 2. Compare position control cycle parameters across all linked NCUs and synchronize to matching values 3. Check MD $MN_MM_NCU_LINK_MASK and confirm FAST-IPO-LINK bit is set if different cycles are intentional 4. Review NCU link group definition in startup parameters and validate node addresses match physical configuration 5. Perform full machine data backup, clear alarm, and reload synchronized parameters to all NCU nodes

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Communication · Intermediate · 30-60 minutes

Alarm 4036

Siemens 840D 4036 - Wrong NCU link configuration by MD

Occurs only with an NCU link system. Different interpolation and position control cycles have been set in the NCUs of the LINK group. This is only allowed if the function FAST-IPO-LINK in MD $MN_MM_NCU_LINK_MASK has been activated. Caution: For diagnostic purposes, two additional alarm parameters ar

Siemens SINUMERIKCommunicationIntermediate30-60 minutes

4036

Siemens 840D 4036 - Wrong NCU link configuration by MD

Wrong NCU link configuration by MD

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Interpolation cycle mismatch between NCUs in LINK group without FAST-IPO-LINK enabled
Position control cycle parameters differ across linked NCUs
MD $MN_MM_NCU_LINK_MASK FAST-IPO-LINK function not activated when required
Inconsistent machine data synchronization between NCU nodes in multi-axis configuration
Incorrect NCU LINK group configuration after system upgrade or parameter reset

Troubleshooting Steps

1Verify all NCUs in the LINK group have identical interpolation cycle settings via HMI machine data editor
2Compare position control cycle parameters across all linked NCUs and synchronize to matching values
3Check MD $MN_MM_NCU_LINK_MASK and confirm FAST-IPO-LINK bit is set if different cycles are intentional
4Review NCU link group definition in startup parameters and validate node addresses match physical configuration
5Perform full machine data backup, clear alarm, and reload synchronized parameters to all NCU nodes

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