Siemens SINUMERIK 840D sl Function Manual page 125

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Objective
The user now wishes to remount attachment head "A" again.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Before changing an attachment head, using the function "Parking a machine axis
(Page 113)", the user must deactivate all position measuring systems of the machine
axis:
DB31, ... DBX1.5 (position measuring system 1) = 0
DB31, ... DBX1.6 (position measuring system 2) = 0
The controller then resets the status signals for the position measuring systems:
DB31, ... DBX102.5 (position measuring system 1 activated) == 0
DB31, ... DBX102.6 (position measuring system 2 activated) == 0
The user waits for the status signals and only now removes the attachment head "A"
from the spindle. This electrically disconnects the encoder cable between the attach‐
ment head "A" and coupling. The absence of encoder E3 does not generate any NC or
drive faults.
Attachment head "B" is now mounted on the spindle.
The user only activates position measuring system 1:
DB31, ... DBX1.5 (position measuring system 1) = 1
The control sets the status signal:
DB31, ... DBX102.5 (position measuring system 1 activated) == 1
The "Park passive position measuring system" function is active for position measuring
system 2. This means that position measuring system 2 does not become passive, but
remains in the "Park" state.
A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
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