Technology Option F01 08.2012
6SE7087-6QX70 (Version AN) Siemens AG
9-72 Compendium Motion Control SIMOVERT MASTERDRIVES
♦ The MDI block is to be stored as permanent MDI block no. 2 in
parameter U551 [823.4].
♦ A length unit of 1 LU = 1 µm has been defined with reference to the
actual value weighting factor (AVWF) (see the section entitled
"Position sensing system for motor encoder").
♦ The axis is to be positioned at target position 385.123 mm using
absolute dimensions.
♦ The traversing velocity is 65 000 mm/min.
♦ The movement is to be performed at 100 % of the
acceleration/deceleration set in MD18/MD19.
→ The following parameters need to be entered:
U710.09 = 1 Select MDI block 1 [809.3], in this case with fixed
binector "1". Any binector can be connected here,
for example a digital input
U551.1 = 9030 90 = absolute dimensions, 30 = 100 %
acceleration/deceleration
U551.2 = 385123 Target position = 385.123 mm = 385 123 µm
= 385 123 LU
U551.3 = 6500000 Velocity = 65 000 mm/min = 65 000 000 µm/min
= 65 000 000 LU/min (input in [* 10 LU/min])
♦ The MDI block is to be defined using receive words 6 to 10 of
PROFIBUS-DP [120.6] , i.e. as MDI block no. 0 [823.4].
♦ A rotary table is used. A length unit of 1 LU = 0.001° has been
defined with reference to the AVWF.
♦ Relative (incremental) dimensions are to be used to position at a
target position located -12.345° away from the current position.
♦ The traversing velocity is 190°/min.
♦ The traversing movement is to take place at only 30 % of the
acceleration/deceleration set in MD18/MD19, since the rotary table
is carrying a heavy load.
→ It is necessary to wire the MDI block from PROFIBUS to MDI mode
by setting the following parameters:
U531 = 3006 Wire G functions from PROFIBUS receive word 6
[120.6] to MDI block no. 0 [823.3]
U532 = 3037 Wire PROFIBUS receive words 7 and 8 as double
word connector KK3037 [120.6] to "position" of MDI
block no. 0 [823.4]
U533 = 3039 Wire PROFIBUS receive words 9 and 10 as double
word connector KK3039 [120.6] to "velocity" of MDI
block no. 0 [823.6]
Example 1:
Define permanent
MDI block by
parameters
Example 2:
Define a variable MDI
block via PROFIBUS-
DP
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