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Code 235013: <location>TM54F: Test stop error

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical <location>TM54F: Test stop error 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: A_INF, B_INF, S_INF, SERVO, TM41, TM54F_MA, TM54F_SL, VECTOR Reaction: NONE Acknowledge: IMMEDIATELY (POWER ON) Cause: An error was detected when carrying out the test stop on the TM54F. As fault response fail-safe input terminal signals are transferred to the motion monitoring functions. Fault value (r0949, interpret hexadecimal): 0xaaaabbcc hex aaaa: Specifies the DOs or F-DIs (dependent on test step cc) for which the expected state was not assumed. The number is bit-coded (bit 0 = F-DI 0 or F-DO 0; bit 3 = F-DI 3 or F-DO 3). bb: Precise problem: 0x01 = Internal error (error state on the opposite side). 0x02 = Error when comparing the switching signals. 0x03 = Internal error (delay time in the new state has still not expired). cc: Test step of the test stop in which the error has occurred. Test stop step cc for slave (hexadecimal): 0x00: Action: L1+ switched out, L2+ switched in - error: Master not in initial state 0x00 and 0x0A. 0x0A: Action: L1+ switched out, L2+ switched in - error: Master not in state 0x15. 0x15: Action: L1+ switched out, L2+ switched out - er ror: F-DIs 0...4 of the master do not correspond to those of the slave (expected: level 0) or master not in state 0x20. 0x20: Action: L1+ switched out, L2+ switched out - error: Master not in state 0x2B. 0x2B: Action: L1+ switched in, L2+ switched in - erro r: F-DIs 5...9 of the master do not correspond to those of the slave (expected: level 0) or master not in state 0x36. 0x36: Action: All slave DOs at OFF - error: Master not in state 0x41. 0x41: Action: All slave DOs at OFF error: Master not in state 0x4C. 0x4C: Action: All slave-DOs at ON - error: State of DI 20...23 does not correspond to the expected state (24V) or the master not in state 0x57. SINAMICS-Alarms 0x57: Action: All slave DOs at ON - error: Master not in state 0x62. 0x62: Action: All slave-DOs at OFF - error: Stat e of DI 20...23 does not correspond to the expected state (0V) or the master not in state 0x6D. 0x6D: Action: All slave DOs at OFF - error: Master not in state 0x78. 0x78: Action: All slave-DOs at ON - error: Stat e of DI 20...23 does not correspond to the expected state (0V) or the master not in state 0x83. 0x83: Action: All slave DOs at ON error: Master not in state 0x8E. 0x8E: Action: All slave-DOs at OFF - error: Stat e of DI 20...23 does not correspond to the expected state (0V) or the master not in state 0x99. 0x99: Action: All slave DOs at OFF - error: Master not in state 0xA4. 0xA4: Action: All slave-DOs at OFF - error: State of DI 20...23 do not correspond to the expected state 24V) or the master not in state 0xAF. 0xAF: Action: All slave DOs at the original state - error: Master not in state 0xBA. 0xBA: Action: All slave DOs at the original state - error: Master not in state 0xC5. 0xC5: Action: Return to start state, test stop completed on the slave side. Error: Master not in state 0xD0. Test stop step cc for master (hexadecimal): 0x0A: No actions - error: Slave not in initial state 0x00. 0x15: No actions - error: Slave not in initial state 0x0A. 0x20: No actions - error: F-DIs 0...4 of the slave do not correspond with those of the master (expected: level 0) or slave not in state 0x15. 0x2B: No actions - error: Slave not in initial state 0x20. 0x36: No actions - error: F-DIs 0...5 of the slave do not correspond with those of the master (expected: level 0) or slave not in state 0x2B. 0x41: Action: All master DOs at OFF - error: Slave not in state 0x36. 0x4C: Action: All master DOs at OF F - error: Slave not in state 0x41. 0x57: Action: All master-DOs at ON - error: State of DI 20...23 of the slave does not correspond to the expected state (24V) or the slave not in state 0x4C. 0x62: Action: All master DOs at ON - er ror: Slave not in initial state 0x57. 0x6D: Action: All master-DOs at ON - error: State of DI 20...23 of the slave does not correspond to the expected state (0V) or the slave not in state 0x62. 0x78: Action: All master DOs at ON - error: Slave not in state 0x6D. 0x83: Action: All master-DOs at OFF - error: State of DI 20...23 of the slave does not correspond to the expected state (0V) or the slave not in state 0x78. 0x8E: Action: All master DOs at OFF - error: Slave not in state 0x83. 0x99: Action: All master-DOs at OFF - error: State of DI 20...23 of the slave does not correspond to the expected state (0V) or the slave not in state 0x8E. 0xA4: Action: All master DOs at OFF - error: Slave not in state 0x99. 0xAF: Action: All master-DOs at OFF - error: Status of DI 20...23 of the slave does not correspond to the expected state (24V) or the slave not in state 0xA4. 0xBA: Action: All master DOs at the original state - error: Slave not in state 0xAF. 0xC5: Action: All master DOs at the origi nal state - error: Slave not in state 0xBA. 0xD0: Wait for the end of the test stop and return to the start state Note: A check of the switching state of the F-DIs and DIs always refers to the switching operation of the previous state. The actions in one state are alwa ys only carried out after the actual state has been checked. Remedy: Check the wiring of the F-DIs and F-DOs and restart the test stop. The fault is withdrawn if the test stop is successfully completed.

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 235013 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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