Zero Speed Monitoring - Siemens SIMODRIVE POSMO A User Manual

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5.5.9

Zero speed monitoring

Description Using the standstill monitoring function, it can be detected when the
axis leaves the target position (under load, for hanging axes, etc.).
Mode of operation The monitoring time (P13) is started after the motion block has been
completed (position reference value = target setpoint).
After the monitoring time (P13) has expired, it is cyclically monitored as
to whether the actual axis position remains within the standstill range
(P14) around the target position.
Objective:
Continually check whether the position of the axis is also maintained.
Position
value
x
Target
position
Position
reference
value
Fig. 5-15 Zero speed monitoring
Fault When the standstill monitoring responds, an appropriate fault is signaled.
Switching–off When the next block is started, the standstill monitoring is disabled.
Parameter P11
(refer to Chapter
P13
5.6.2)
P14
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SIMODRIVE POSMO A User Manual (POS1) – 08/2013 Edition
Target range (P11)
Position
actual
value
Monitoring time (P13)
Target range
Monitoring time
Standstill range
5 Description of the Functions
5.5 SIMODRIVE POSMO A functions
Standstill range
(P14)
From here, cyclic evaluation of the
standstill monitoring
From here, changeover to holding
and standstill controller
t
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5