Siemens SIMOVERT MASTERDRIVES Manual page 831

05.2006
Introduction of 3
alternatives of
setting the
displacement angle
for synchronization
[841]
Catch-up [837]
NOTE
Modified parameters
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
An angle displacement for synchronization can now be conveniently set
in the following 3 ways:
♦ Setting an absolute displacement angle via the connector
selectable by the new parameter U678.01
♦ Setting a relative displacement angle via connectors or
parameters, which can be supplemented either in a positive or a
negative direction, depending on the current zero position
♦ Setting a displacement angle in inching mode with a selectable
variable speed (similar to a motorized potentiometer)
These displacement angle settings can be made in any size. Overflows
of more than one slave axis revolution can be coped with. The
displacement angle setting can be used, for example, to set up an
index control system for printing machines.
The newly introduced catch-up function enables a drive to be
uncoupled from an angular-locked synchronizing multi-motor system
(e.g. shaftless printing press) and to be operated autonomously at its
own speed setpoint ("isolated setpoint"). It also enables a drive to halt
at a specified angular position.
The drive can catch up to the speed of the running machine from the
halt position or from its current speed in autonomous operation. After
the catch-up command has been set, the drive accelerates to the
machine speed and can then be coupled back accurately into angular
synchronization after reaching speed synchronization.
The "Catchup" function is not released until SW version V1.32.
♦ U501.23
Machine data MD23 "Maximum traversing speed":
Can now be set up to 20 000 000 instead of up to
1 000 0900 [x100 LU/min]
♦ U501.10
Machine data MD10 "Offset for absolute-value
encoder":
Now remains in non-volatile storage also after
electronics power supply has been de-
energized/energized.
Compendium Motion Control
Technology Option F01
9-183