Speed Setpoint Monitoring - Siemens SINUMERIK 808D Function Manual

Effectiveness
Clamping monitoring is activated by the interface signal "Clamping active". It replaces standstill monitoring during clamping.
Clamping monitoring is active on axes and position-controlled spindles.
Effect
If the axis is pushed out of position beyond the clamping tolerance during clamping the following occurs:
● Alarm 26000 "Clamping monitoring" is triggered
● The affected axis/spindle is brought to a standstill with rapid stop (with open position control loop) along a speed setpoint
ramp. The braking ramp time is set in
MD36610 AX_EMERGENCY_STOP_TIME (duration of the braking ramp for error states).
● If the axis/spindle is assigned to an interpolatory grouping with other axes/spindles, then these are also braked by rapid
stop with following error reduction (default for partial position setpoint = 0).
4.2.5

Speed setpoint monitoring

Function
Speed setpoint monitoring checks whether the setpoint specification does not exceed the maximum permissible drive speed
in MD 36210 CTRLOUT_LIMIT (maximum speed setpoint). If required, the speed is limited to this value and the axis/spindle
stopped and an alarm output.
The maximum speed for the axes (in percent) exceeds the speed at which the velocity in MD32000 MAX_AX_VELO is
reached (100%). This also determines the control margin.
On an analog spindle the maximum speed that can be output must not exceed the speed reached at the maximum setpoint
output voltage of 10 V (100%).
The speed setpoint consists of the speed setpoint of the position controller and the feedforward control parameter (if
feedforward control is active).
Speed setpoint calculation:
Effectiveness
Speed setpoint monitoring is always active for axes and spindles.
Effect
The following occurs if the maximum speed setpoint value is exceeded:
● Alarm 25060 "Speed setpoint limiting" is triggered
● The affected axis/spindle is brought to a standstill using a rapid stop (with open position control loop) along a speed
setpoint ramp.
The braking ramp duration is set in MD36610 AX_EMERGENCY_STOP_TIME (braking ramp duration for error states).
● If the axis/spindle is involved in interpolation with other axes/spindles, these are stopped using a rapid stop with following
error reduction (default for partial position setpoint = 0).
Function Manual
01/2017
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