Siemens SIMOVERT MASTERDRIVES Manual page 747

05.2006
9.4.36 Synchronization to master value [841]
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
With "Synchronization to master value", the zero position of the slave
axis is synchronized once to the zero position of the master axis via a
parameterizable compensation movement.
A 0 ==> 1 edge of the "Synchronize to master value" command triggers
synchronization. The currently present master value is converted once
over the entire synchronization path. After that, the position difference
∆s_Master_Slave to be corrected between the master and the slave is
calculated from the thus determined master position setpoint, the
current displacement setpoint (KK812 [841.8] ) and the currently
applicable slave position setpoint. In order to compensate for this, the
axis performs a compensation movement [841.7] with an adjustable
differential speed and acceleration (U691.1 and .2). The integral of the
travel curve v = f(t) traversed here corresponds to the position
difference that has to be corrected.
By taking the "Current displacement" into account in the calculation
(841.7 ==> 841.2) it is ensured that a slave axis displacement (offset)
already implemented by the displacement angle settings will remain.
The total performed position correction has the amount
Position correction = master value – position setpoint slave + displacement
i.e.
∆
s_Master_Slave [841.5] = s_Master [834.3] - s_set_Slave [836.6] +
You can select via operating mode U699.1 whether the compensation
movement of the axis is to take place in positive direction, in negative
direction or via the shortest route (e.g. correction from 350° to 10° shall
be effected by 20° forwards, not by 340° backwards).
You can also synchronize the two axes within a window.
Synchronization within window 1 is performed via the shortest route for
small, quick compensatory motions. Synchronization outside window 1,
but within window 2, is performed in the parameterized direction. The
axes cannot be synchronized outside window 2. The applicable
synchronization mode is then checked back via binector.
Detailed information about synchronization can be found in
Chapter "Synchronization functions" in the Function Description
of the Manual /1/.
Compendium Motion Control
Current displacement [841.8]
Technology Option F01
9-99