Code 230070: <location>Cycle requested by the power unit module not supported
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Cycle requested by the power unit module not supported alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Message value: %1 Drive object: All objects Reaction: OFF2 Acknowledge: IMMEDIATELY Cause: The following applies for CU31x and CUA31: A cycle is requested that is not supported by the power unit. Fault value (r0949, interpret hexadecimal): The following applies for CU31x and CUA31: 0: The current control cycle is not supported. 1: The DRIVE-CLiQ cycle is not supported. 2: Internal timing problem (distance between RX and TX instants too low). 3: Internal timing problem (TX instant too early). Remedy: The following applies for CU31x and CUA31: The power unit only supports the following cycles: 62.5 µs, 125 µs, 250 µs and 500 µs Fault value (r0949, interpret hexadecimal): The following applies for CU31x and CUA31: 0: Set a permitted current control cycle. 1: Set a permitted DRIVE-CLiQ cycle. 2/3: Contact the manufacturer (there is pos sibly an incompatible firmware version).
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 230070 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.
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