Siemens SINUMERIK 840Di Function Manual page 87

Speed setpoint monitoring delay
To prevent an error reaction from occurring in every speed limitation instance, a delay time
can be configured. Only if the speed limitation is required for longer than the configured time
does the corresponding error reaction occur.
MD36220 $MA_ CTRLOUT_LIMIT_TIME (Speed setpoint monitoring delay)
Effectivity
The speed setpoint monitoring is only active for closed-loop position-controlled axes and
cannot be deactivated.
Effect
Upon exceeding of the configured delay time, the following occurs:
• Alarm: "25060 Axis <
• The affected axis is stopped via the configured braking ramp in follow-up mode:
• If the axis/spindle is involved in interpolation with other axes/spindles, these are brought
2.1.8 Actual velocity monitoring
Function
The actual velocity monitoring monitors the current actual velocity of a machine axis for the
configured threshold:
MD36200 $MA_AX_VELO_LIMIT (velocity monitoring threshold)
As long as no error is present, the actual velocity of an axis/spindle never becomes greater
than the configured threshold because the threshold is entered approx. 5-10% larger than
the maximum traversing velocity.
Exceeding of the configured threshold of the velocity monitoring generally only occurs during
drive errors.
Axis Monitoring, Protection Zones (A3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Axis identifier
MD36610 $MA_AX_EMERGENCY_STOP_TIME
(Time for braking ramp when an error occurs)
to a standstill with rapid stop (set velocity = 0).
Note
Upon reaching the speed setpoint monitoring, the position feedback loop of the axis
becomes non-linear due to the limitation. Contour errors result if the axis is involved in
generating the contour.
> Speed setpoint monitoring"
Detailed Description
2.1 Motion monitoring functions
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