Siemens Simovert Masterdrives Compendium page 773

Technology Option F01
Setting information
for SIMOLINK
[140...160]
NOTE
Start position for
synchronization
Basic Settings of the
Synchronization
Block
9-82
The SIMOLINK cycle time in P746 should be set to the sampling time of
the synchronization block, e.g. to 3.20 ms if the synchronization is
nested in sampling time T4 with 5 kHz clock frequency (e.g.
U953.33 = 4).
If you want to start synchronization with a defined start position, you
must first approach the position in a positioning mode and stop the
drive at this point. You can then start the synchronization, commencing
with speed "0".
The "offset setting" [841] also allows you to perform the orientation on-
the-fly with reference to a synchronization marker after starting the
synchronization mode.
The following section describes the settings relating to all
synchronization functions.
Master path setpoint U600.01-03 / U606
Parameter U600 [834.1] can be set to predefine 3 sources as the
master setpoint of the synchronization block. Parameter U606 can be
used to select one of these three sources. These can be:
♦ The output of the virtual master axis
Output connector K817 [832] of the virtual master axis is wired to a
SIMOLINK send word for the slave drives. The connection to the
synchronization block should always be routed via the receive buffer
of SIMOLINK, even for the master drive (e.g. KK7031 [150.7]) and
not directly from the virtual master axis. You should not therefore
use KK817. This ensures that the master drive receives its path
setpoint from the virtual master axis at the same time as all the
slave drives.
♦ Position sensing output as real master
For synchronization with a real master, the measured actual position
is wired to the input of the synchronization block. The position can
be transmitted from SIMOLINK or a position sensing system.
Master speed setpoint U600.04-06
It is possible to connect the speed setpoint as well as the position
setpoint. Connecting the speed setpoint will increase the accuracy of
the speed precontrol signal (KK312). If it is not connected, the speed is
calculated internally from the position setpoint and the quality of the
signal will depend on the set resolution. For this reason, the speed
input should always be used for synchronized applications with high
accuracy requirements. In such cases, it is important that the speed
acting as the master setpoint of the synchronization block is produced
as a percentage value [%] by the same setpoint source as the position
setpoint in length units [LU].
For this purpose, it is imperative to parameterize the scaling rate
master (U607.2).
6SE7087-6QX70 (Version AN)
Compendium Motion Control
08.2012
Siemens AG
SIMOVERT MASTERDRIVES