Supplementary Conditions - Siemens SINUMERIK 840D sl Function Manual

A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
with <n> = 0 (position measuring system 1) or 1 (position measuring system 2)
Value
1
2
Note
Position and "Referenced" status of the previously active position measuring system are only
transferred for incremental position measuring systems, depending on MD34210
$MA_ENC_REFP_STATE[<n>] – and only when the "Park passive position measuring system"
function is active (MD31046 $MA_ENC_PASSIVE_PARKING[<n>] = 1).
The transferred position has the accuracy of the previous active position measuring system.
The position measuring system should be rereferenced if this accuracy is not adequate.
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 Chapter
"R1: Referencing (Page 1149)".
3.2.9.2

Supplementary conditions

Interaction with "dual position feedback"
The "Park passive position measuring system" function cannot be used in conjunction with the
"dual position feedback" function (MD32960 $MA_POSCTRL_DUAL_FEEDBACK_TIME > 0).
Interaction with "position difference input"
The "Park passive position measuring system" function cannot be used in conjunction with the
"position difference input" function (MD32950 $MA_POSCTRL_DAMPING > 0).
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Meaning
Only the position from the previous active position measuring system is transferred.
The position measuring system is not referenced:
DB31, ... DBX60.4 (referenced/synchronized, position measuring system 1) == 0
or
DB31, ... DBX60.5 (referenced/synchronized, position measuring system 2) == 0
Position and "Referenced" status are transferred from the previously active position measur‐
ing system.
The position measuring system is referenced:
DB31, ... DBX60.4 (referenced/synchronized, position measuring system 1) == 1
or
DB31, ... DBX60.5 (referenced/synchronized, position measuring system 2) == 1
WARNING
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions