Siemens Simovert Masterdrives Compendium page 770

08.2012
Nesting the
synchronization in
the basic unit
CAUTION
NOTE
Siemens AG 6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES
Differences :
Synchronization as a
Positioning Mode
Parameter U953.32 = 4
settings for
U953.33 = 20
nesting in
sampling time
Relevant MD11
machine data MD49
MD12 *) Software limit switches ...
MD13 *) ... for linear axis
MD15 *) Following error
MD23
Relevant STA] Start (0
positioning activated after power on!) **)
control signals
[MODE_IN] Mode selection
from sheet
[809]
Relevant [ARFD]
positioning [FUR_M]
status signals [OTR]
from sheet
[811] [FWD]
[BWD]
[MODE_OUT]
[FUR]
[ST_EN]
*) The following warnings are triggered during synchronization as a positioning mode
and the axis is brought to a standstill in speed control mode via the ramp configured
in MD43:
A141 = Following error - in motion (MD15)
A195 = Overtravel negative
A196 = Overtravel positive
**) If the start command goes to "0" during travel, the axis is brought to a standstill via
the ramp configured in MD42.
The nesting of the synchronization block is independent of whether the
call was made as a free block or from the mode manager of the
positioning system. In the following example circuit, position sensing is
performed using the motor encoder.
Only the signals related to synchronization are shown.
See section 9.4.41 "Continue synchronism".
Compendium Motion Control
Synchronization as a mode
monitoring - in motion
→
1 edge must be
Axis referenced
Virtual master running
Overtravel
(with linear axis)
Axis moves forwards
Axis moves backwards
Mode
checkback signal
Function running
Start enable
(MD12)
(MD11)
Technology Option F01
↔
as a free block
Synchronization as a
Free Block
U953.32 = 20
U953.33 = 4
MD11
Linear axis/rotary
axis length [836.4]
MD49
Precontrol -
speed [836.7]
MD23 (for precontrol)
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