Parking The Passive Position Measuring System; Function - Siemens SINUMERIK 840D sl Function Manual

Machine axis without position measuring system
For a machine axis without a position measuring system (speed-controlled spindle), a status
equivalent to "parking" is activated by canceling the controller enable:
● DB31, ... DBX2.1 (controller enable) = 0
3.2.9

Parking the passive position measuring system

3.2.9.1

Function

Contrary to the "Parking a machine axis (Page 113)" function, for which all position measuring
systems of a machine axis are deactivated, using the "Park the passive position measuring
system" function, users have the option, of only "parking" the passive position measuring
system of a machine axis (i.e. to deactivate the encoder evaluation and monitoring in the drive
and in the control), while the active position measuring system can remain operational.
Note
For an explanation of active/passive measuring system, refer to "Setpoint/actual-value
system (Page 336)".
Application
The "Park passive measuring system" function can, for example, be used in the following cases:
● Changing attachment heads with and without integrated encoder
Using the "Park passive position measuring system" function, it is possible to mount
attachment heads alternating with and without integrated encoder for different machining
tasks on the main spindle, without the missing encoder signals initiating drive and control
faults.
See also:
– Example: Changing an attachment head for a direct position measuring system
– Example: Changing an attachment head for two direct position measuring systems
● Using linear position measuring systems, which are not available over the complete
traversing range of a machine axis
Using the "Park passive position measuring system" function, it is possible to pass through
the range outside the linear position measuring system, without the missing encoder signals
initiating drive and control faults.
See also:
–
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
(Page 119)
(Page 123)
"Example: Measuring system switchover when encoders are missing in certain parts
of the range (Page 127)".
A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
115