Technology Option F01 08.2012
6SE7087-6QX70 (Version AN) Siemens AG
9-138 Compendium Motion Control SIMOVERT MASTERDRIVES
9.7.2.11 Testing the virtual master axis
a) Start command = 1 (switch on terminal 7) on drive 2
b) Set potentiometer to 10 V (corresponds to 100 %)
c) Check the velocity setpoint of the virtual master axis at KK820
[832.8] (e.g. at r33.1 [30.2] if P32.1 = 820 is set)
d) Start = 0
e) Set potentiometer to 0 V
f) Start = 1 ==> observe the reduction in velocity setpoint from 100 %
to 0 % at r33.1: it takes 1 s (this is easier to visualize if the
acceleration time is increased temporarily from 1 s to 10 s with
U685 = 17).
9.7.2.12 Configuring the synchronization function
The synchronization function is nested as a "positioning mode" in
our application example (see the section entitled "Synchronization
mode - overview" in "Brief Description of the Technology Functions"
and [802.8]), i.e. U953.33 can retain the factory setting of 20.
The input path setpoint [834.1] is transferred from SIMOLINK receive
double word 1 KK7031 [150.6] with the factory setting (U600.01 = 7031
and U606 = 0). The master value is therefore already correctly
connected to the output of the virtual master axis - via the SIMOLINK
(see steps 10 and 13 in application example 2).
The master axis cycle length [834.2] must be set to the same value as
the axis cycle length of the virtual master (U687; see [832.6] and step
10 in application example 2):
U601=36 000 ; Master axis cycle length [834.2] = Axis cycle
; length of the virtual master [832.6]
; = 36000 LU = 10 motor revolutions each
; with 360.0° (1LU = 0.1°; see actual value weighting factor AVWF)
Angular synchronization 1:1 is to be used in our example (no
engaging/disengaging cycle, no gearbox, no cam). This mode is
already initialized with the factory settings:
[Operation] = 0 [834.5] and [FUNCTION] = 0 [836.4].
The slave axis cycle length [836.4 and 836.6] has already been set
correctly to 36000 LU during configuration of the positioning system
with machine data MD11 (step 6 in application example 2).
The control inputs of the position correction system [836.4] are already
wired appropriately with the factory settings (for the use of a motor
encoder). The normalization of the output velocity setpoint MD23
[836.7] was also already set to the correct value when the machine
data were configured (step 6 in application example 2).
Nesting the
synchronization
function
Wiring the master
value for
synchronization
Setting the master
axis cycle length
Setting the
synchronization
mode
Setting the slave
axis cycle length
Setting the
parameters for
position correction
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