Siemens sinumerik fm-nc - Monitoring Functions (Axis)

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Parameters to the Control and the PLC Pro
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6.9 Axes and spindles
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 Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
6.9.11 Monitoring functions (axis)
References: /FB/, A3, “Axis monitoring”
During positioning, a function monitors whether the axis has reached the
positioning window (exact stop). It also monitors whether an axis for which no
traverse command is pending leaves a certain tolerance window (zero speed
monitoring, clamping tolerance).
STOP_LIMIT_COARSE (fine exact stop)
S IS “Position reached with coarse exact stop” (DB31, ... DBX60.6).
STOP_LIMIT_FINE (fine exact stop)
S IS “Position reached with fine exact stop” (DB31, ... DBX60.7).
POSITIONING_TIME (coarse exact stop delay)
S This MD represents the delay after which the actual value must have
reached the “Fine exact stop” tolerance window when the setpoint position
at the block end is reached.
S If the value does not reach the fine exact stop window within this time, the
alarm “25080 axis [name] positioning monitoring” is generated.
The control switches to follow-up mode.
STANDSTILL_POS_TOL (zero speed tolerance)
S The machine data specifies the position tolerance which a stationary axis
may not leave.
S If the axis leaves the tolerance window, the alarm “25040 axis [name] zero
speed control” is output. The control switches to follow-up mode.
STANDSTILL_DELAY_TIME (zero speed monitoring delay)
S The MD represents the delay after which the actual value must have
reached the “zero speed tolerance” window when the setpoint position at the
block end is reached.
S If the position tolerance is not reached within this time, the alarm “25040 axis
[name] zero speed monitoring” is generated.
The control switches to follow-up mode.
CLAMP_POS_TOL (clamping tolerance)
S Position tolerance while the “clamping active” signal is present at the PLC
interface. When the tolerance is exceeded, the alarm “26000 axis [name]
clamping monitoring” is generated.
S IS “Clamping active” (DB31, ... DBX2.3)
Monitoring of
positioning
MD 36000
MD 36010
MD 36020
MD 36030
MD 36040
MD 36050