Monitoring For Axis - Siemens SINUMERIK 840D Simodrive 611 digital Startup Manual

6 Programming the control
6.9 Axes and spindles
6.9.11

Monitoring for axis

Monitoring the
positioning
MD 36000
MD 36010
MD 36012
MD 36020
MD 36030
MD 36040
MD 36050
6-108
Reference material: /FB1/ Functional description of the basic machines
/A3/ Axis monitoring, protected areas
/B1/ Continuous-path operation, exact stop and
/G2/ Velocities, setpoint/actual value systems, control
For positioning, the monitoring ensures that the axis reaches the position
window (exact stop). It also checks whether an axis for which no traversing
command has been issued remains within a certain tolerance window (zero
speed control, clamping tolerance).
STOP_LIMIT_COARSE (coarse 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)
STOP_LIMIT_FACTOR[n] (factor for parameter set-independent evaluation of
the exact stop (coarse or fine) and zero-speed monitoring)
S
The ration between the three following values remains the same at all times:
MD 36000: STOP_LIMIT_COARSE
MD 36010: STOP_LIMIT_FINE
MD 36030: STANDSTILL_POS_TOL
POSITIONING_TIME (fine exact stop delay)
S
The MD represents the delay time after which the actual value must have
reached the "exact stop fine" tolerance window when the setpoint position at
the block end is attained.
S
If the value does not reach the exact stop fine window within this time, the
"25080 axis [name] positioning monitoring" alarm 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 standing axis
must adhere to.
S
If the axis leaves the position tolerance window, the "25040 axis [name]
zero-speed control" alarm is output. The control switches to follow-up mode.
STANDSTILL_DELAY_TIME (delay time zero-speed control)
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 attained.
S
If the position tolerance is not reached within this time, the "25040 axis
[name] zero-speed control" alarm 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)
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
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© Siemens AG 2006 All Rights Reserved
03/2006