Code 202059: <location>Trace: Time slice clock cycle for 2 x 8 recording channels not valid
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Trace: Time slice clock cycle for 2 x 8 recording channels not valid 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: Drive object: All objects Reaction: NONE Acknowledge: NONE Cause: The selected time slice cl ock cycle cannot be used for the setting p4702 = 1 (2 x 8 recording channels). See also: p4723 (Time slice cycle for trace) Remedy: Enter the clock cycle of an existing ti me slice with a cycle time >= 4 ms or reduce the number of recording channels to 4 per trace. The existing time slices can be read out via p7901. See also: r7901 (Time slice cycle times)
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 202059 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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