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Siemens SINUMERIK Controller
Spindle · Intermediate · 30-120 minutes
Siemens 10810 - Block master spindle not defined
Alarm 10810 fires when G95 (feedrate per revolution), G96 (constant surface speed), or G331/G332 (rigid tapping) is programmed without a defined master spindle. The NCK requires a master spindle reference to derive speed values, which is either missing from MD 20090 SPIND_DEF_MASTER_SPIND or not explicitly set via SETMS keyword in the NC program.
10810
Siemens 10810 - Block master spindle not defined
Block master spindle not defined
The function "Revolutional feedrate" (with G95 or G96), or "Rigid tapping" (with G331/G332) has been programmed, although no master spindle is defined from which the speed could be derived. For the definition the MD 20090 $MC_SPIND_DEF_MASTER_SPIND is available for the default or the keyword SETMS in the part program, thus allowing each spindle of the channel to be redefined as master spindle Control reaction: Correction block is reorganized. Local alarm reaction. Interface signals are set. Alarm display. Alarms.
Root Cause Summary
Alarm 10810 fires when G95 (feedrate per revolution), G96 (constant surface speed), or G331/G332 (rigid tapping) is programmed without a defined master spindle. The NCK requires a master spindle reference to derive speed values, which is either missing from MD 20090 SPIND_DEF_MASTER_SPIND or not explicitly set via SETMS keyword in the NC program.
Safety
- Spindle hazard: ensure the spindle is at standstill before working near it; follow lockout/tagout procedures.
Causes and Fixes
- 1
Access Siemens HMI menu: Maintenance > Machine Data > Spindle Parameters. Navigate to MD 20090 SPIND_DEF_MASTER_SPIND for the affected channel.
- 2
Verify the parameter value corresponds to a valid spindle number defined in MD 20100 SPIND_DEF_NR (spindle definition number). Valid spindle IDs typically range 1–8 depending on machine configuration.
If MD 20090 = 0 or blank, no default master spindle is configured.
- 3
Set MD 20090 to the spindle number used for feedrate-dependent operations (usually the main spindle). For example, set to 1 for S1 (first spindle).
- 4
Save and activate machine data (Ctrl+S or Save function in HMI). Perform a machine reset (warm/cold reset) to load updated MD values into NCK memory.
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