Siemens SINUMERIK 808D Function Manual

Function Manual
01/2017
47
Synchronization process
A synchronization process is always required in the following cases:
● after the reference point approach of all axes included in a grouping,
● if the axes become desynchronized (see below).
Operational sequence failure
If the referencing process described above is interrupted as a result of disturbances or a RESET, proceed as follows:
●
Abort within section 1 or 2:
Restart reference point with leading axis (see section 1)
●
Abort in section 3:
In cases where the gantry axes have not yet been referenced (IS "Referenced/Synchronized" = 1), the gantry
synchronization process can be started again with IS "Synchronize gantry grouping".
Restart gantry synchronization
Synchronization of the gantry axes can be started with IS "Start gantry synchronization" under the following conditions only:
● "JOG/REF.POINT" mode must be active. The following interface signal must be set:
DB3100.DBX0001.2 (active machine function REF)
● DB390x.DBX5005.5 = 0 (gantry grouping is synchronized)
● All grouping axes operate within the tolerance windows:
DB390x.DBX5005.4 = 1 ("Gantry synchronization ready to start")
● Axis is not referenced in the NC channel
DB3300.DBX0001.0 = 0 (referencing active)
If gantry synchronization is
not started from the referencing process
by means of IS "Start gantry synchronization", then
the
current actual position of the leading axis
- rather than the referencing position from MD34100 - will be specified as the
target position and approached in the decoupled state.
Note
Automatic synchronization can be locked by the leading axis by means of the following interface signal:
DB380x.DBX5005.5 (automatic synchronization locking)
This always makes sense if no axis enabling signal has yet been issued for the ax
es. In this case, the synchronization
process should also be started explicitly with the interface signal:
DB380x.DBX5005.4 = 1 (start gantry synchronization)
Loss of synchronization
The gantry grouping becomes desynchronized (DB390x.DBB5005 = 0) if:
● The gantry axes were in "Follow-up" mode
● The reference position of a gantry axis is lost, e.g. during "Parking" (no measuring system active)
● A gantry axis is re-referenced (DB390x.DBB0000 = 0)
● The gantry grouping was separated (MD37140 = 1)
In cases where the gantry grouping has lost synchronization during operation as the result of a disturbance, then the gantry
synchronization process can be restarted directly by means of IS "Start gantry synchronization" (condition:
DB390x.DBB0000 = 1 for all axes in the gantry grouping). In this case, the synchronizing axes traverse the current actual
position of the leading axis in the decoupled state.
If an EMERGENCY OFF occurs while a gantry grouping is moving, and is then rescinded, and both axes have drifted apart
less than the standstill tolerance of the following axis, then the gantry grouping will automatically synchronize. It no longer
needs to go in the BA REF.
Reference point selection
To ensure that the shortest possible paths are traversed when the gantry axes are referenced, the reference point values for
the leading and synchronized axes should be the same (MD34100).

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English