Diagnosis Of Spindle Speed Limitation - Siemens SINUMERIK 840D sl Function Manual

S1: Spindles
16.8 Spindle monitoring
The minimum gear stage speed is effective only in speed mode and can only be undershot by:
● Spindle override 0%
● M5
● S0
● DB31, ... DBX4.3 (spindle stop)
● DB31, ... DBX2.1 (withdraw controller enable)
● DB21, ... DBX7.7 (reset)
● DB31, ... DBX2.2 (delete distance-to-go / spindle reset)
● DB31, ... DBX18.5 (oscillation speed)
● DB21, ... DBX7.4 (NC stop axes plus spindles)
● DB31, ... DBX1.3 (axis/spindle disable)
● DB31, ... DBX16.7 (delete S value)
Maximum speed
The maximum speed of the gear stage of a spindle is configured in machine data:
MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT[<n>]
The speed setpoints, generated taking into account the override, are limited to this speed.
The following NC/PLC interface signal is set in the case that the speed is limited:
DB31, ... DBX83.1 (speed setpoint limited)
16.8.5

Diagnosis of spindle speed limitation

Function
The limit or increase of the spindle speed is signaled by the output of the following NC/PLC
interface signals:
● DB31, ... DBX83.1 (setpoint speed limited)
● DB31, ... DBX83.2 (setpoint speed increased)
To diagnose the effective/limiting spindle parameters, one can have read access to the most
important parameters of spindle motion via system variables. The system variables are
indexed with the spindle number and they return only values that are relevant to the speed
control and spindle position modes.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions