Siemens SINUMERIK 802D sl Function Manual page 43

Figure 2-1 Relation between position, standstill, and clamping monitoring
Effectiveness
Positioning monitoring is always activated after the termination of motion blocks "according
to the setpoint" (setpoint has reached destination).
Position monitoring is active for axes and position-controlled spindles.
Deactivation
When the programmed "Exact stop limit fine" has been reached or a new setpoint has been
output (e.g. for positioning according to "Exact stop coarse" followed by a block change), the
position monitoring is deactivated.
Effect
If the limit value for "Exact stop fine" has not yet been reached when the positioning
monitoring time has elapsed, the following action is performed:
● Output of alarm 25080 "Positioning monitoring"
● The affected axis/spindle is brought to a standstill using a rapid stop (with open position
● If the axis/spindle is involved in interpolation with other axes/spindles, these are stopped
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
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).
using a rapid stop with following error reduction (default for partial position setpoint = 0).
Axis Monitoring (A3)
2.2 Motion monitoring functions
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