Siemens SINUMERIK 840D sl Function Manual page 114

A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
● DB31, ... DBX102.5 (position measuring system 1 activated) == 0
● DB31, ... DBX102.6 (position measuring system 2 activated) == 0
Deactivation
"Parking" a machine axis is deactivated by setting the axis-specific NC/PLC interface signals
for the position measuring system to be activated and the controller enable of the machine
axis:
● DB31, ... DBX1.5 (position measuring system 1) = 1
or
DB31, ... DBX1.6 (position measuring system 2) = 1
● DB31, ... DBX2.1 (controller enable) = 1
The position control for the machine axis becomes active again at the current position.
The encoder state of the position measuring systems depends on the measuring system type:
● Incremental position measuring system ⇒ "not referenced" state
– DB31, ... DBX60.4 (referenced/synchronized, position measuring system 1) == 0
– DB31, ... DBX60.5 (referenced/synchronized, position measuring system 2) == 0
● Absolute position measuring system ⇒ "referenced/synchronized" state
– DB31, ... DBX60.4 (referenced/synchronized, position measuring system 1) == 1
– DB31, ... DBX60.5 (referenced/synchronized, position measuring system 2) == 1
The following NC/PLC interface signals are also set again:
● DB31, ... DBX61.5 (position controller active) == 1
● DB31, ... DBX61.6 (speed controller active) == 1
● DB31, ... DBX61.7 (current controller active) == 1
● DB31, ... DBX93.7 (pulses enabled) == 1
● DB31, ... DBX102.5 (position measuring system 1 activated) == 1
● DB31, ... DBX102.6 (position measuring system 2 activated) == 1
Incremental position measuring systems
After deactivation of the "parking" state, incremental position measuring systems have to be
referenced before they have "referenced" encoder status.
Incorrect synchronization of the position measuring system caused by offset of the actual
machine axis position
If changes have been made to the position measuring system during "parking" that require a
change to the parameterized machine data, for example, another encoder has been mounted,
the position measuring system must be completely remeasured and referenced See Section
"R1: Referencing (Page 1149)."
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WARNING
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions