Siemens SINUMERIK 840D sl Function Manual page 1699

2.6.4 Minimum/maximum Speed of gear step
Minimum speed
The minimum gear step speed is entered in machine data:
MD35140 $MA_GEAR_STEP_MIN_VELO_LIMIT
.
This setpoint speed cannot be undershot by programming an S value, which is too small.
NC/PLC IS:
DB31, ... DBX83.2 (Setpoint speed increased) (Programmed speed too low) is set.
The minimum gear step speed is effective only in speed mode and can only be undershot
by:
• Spindle override 0%
• M5
• S0
• NC/PLC IS DB31, ... DBX4.3 )Spindle stop)
• Withdraw NC/PLC IS:
• NC/PLC IS DB21, ... DBX7.7 (Reset)
• NC/PLC IS DB31, ... DBX2.2 (Delete distance-to-go/Spindle reset)
• NC/PLC IS DB31, ... DBX18.5 (Oscillation speed)
• NC/PLC IS DB21, ... DBX7.4 (NC STOP axes plus spindles)
• NC/PLC IS DB31, ... DBX1.3 (Axis/Spindle disable)
• NC/PLC IS DB31, ... DBX16.7 (Delete S value)
Maximum speed
The maximum gear step speed is entered in machine data:
MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT
.
When the gear step is engaged, this setpoint speed cannot be exceeded.
When the programmed spindle speed is limited, NC/PLC IS:
DB31, ... DBX83.1 (Setpoint speed limited) (programmed speed too high)
is set.
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
DB31, ... DBX2.1 (Controller enable).
Detailed Description
2.6 Spindle monitoring
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