Protection Zones; General - Siemens SINUMERIK 840D sl Function Manual

A3: Axis Monitoring, Protection Zones

3.3 Protection zones

①
②
③
Result
Both position measuring systems are referenced. The position of the linear position measuring
system corresponds to the position of the motor measuring system at the switchover instant.
The linear position measuring system must be rereferenced if the position accuracy is not
sufficient.
3.3 Protection zones
3.3.1

General

Function
Protection zones are static or moveable in 2- or 3-dimensional ranges within a machine to
protect machine elements against collisions.
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Before the table reaches the end of the linear position measuring system, a switchover
must be made to the motor measuring system. The user does this by activating both
position measuring systems:
DB31, ... DBX1.5 (position measuring system 1) = 1
DB31, ... DBX1.6 (position measuring system 2) = 1
Using the "Park passive position measuring system" function, the linear position meas‐
uring system, which is passive after the measuring system switchover, is parked by the
control.
The control resets the status signal:
DB31, ... DBX102.6 (position measuring system 2 activated) == 0
The user waits for the status signal before continuing to traverse in the range outside
the linear position measuring system.
Traversing through the range outside the linear position measuring system with the
motor measuring system.
If the table returns to the linear position measuring system range, at standstill, the user
switches from the motor measuring system to the linear position measuring system:
DB31, ... DBX1.5 (position measuring system 1) = 0
DB31, ... DBX1.6 (position measuring system 2) = 1
The control sets the status signal:
DB31, ... DBX102.6 (position measuring system 2 activated) == 1
The motor measuring system becomes a passive position measuring system.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions