Code 201696: <location>SI Motion: Testing of the motion monitoring functions selected when booting
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>SI Motion: Testing of the motion monitoring functions selected when booting 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: SERVO, VECTOR Reaction: NONE Acknowledge: NONE Cause: The test of the motion monitoring functions was already illegally active when booting. This is the reason that the test is only carried out again after selecting the forced checking procedure parameterized in p9705. Note: This message does not result in a safety stop response. See also: p9705 (SI Motion: Test stop signal source) Remedy: De-select the forced checking procedure of the sa fety motion monitoring functions and then select again. The signal source for initiation is parameterized in binector input p9705. Note: SI: Safety Integrated See also: p9705 (SI Motion: Test stop signal source)
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 201696 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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