Siemens Simovert Masterdrives Compendium page 730

08.2012
NOTE
AVWF as numerator/
denominator
Siemens AG 6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES
Encoder:
Gear ratio:
Diameter of drive roller:
How many µm does the slide travel in one encoder increment?
AVWF = number of LUs per position increment
AVWF 1
×
=
 μ 
m Gear ratio
 
inc
 

AVWF 1 D
 
× π ×
=
[ ]
 μ  μ
m i m

 
inc
 
AVWF 1
×
= 300000
 μ 
m 10
 
inc
 
AVWF
= 23,0097118 1828
 μ 
m
 
inc
 
Resulting Actual Value Weighting Factor (AVWF)
Integer places
3-digit P169
23
Trailing zeroes must be entered with the decimal place component;
leading zeroes can be omitted.
Examples:
AVWF = 12.3
AVWF = 12.00000003
When the actual value weighting factor (AVWF) is specified as a
numerator / denominator, the length units LU are entered in the
numerator and the encoder increments in the denominator.
Example:
A rotary axis is driven via a gear unit with a gear ratio of 1:3. The actual
position sensing function is parameterized such that 2
correspond to one motor revolution. One revolution on the load side
must equal 360000LU.
360000 360000
= =
AVWF
16
196608
⋅
2 3
Compendium Motion Control
Resolver
(P171=12 ≅ 4096
increments/revolution)
1:10
300 mm
× π ×
Diameter
inc / revolution

1
 
×
P171
 2
[ ]
inc
1
μ × π ×
m
4096 inc
μ m
→ P169 = 12, P170 = 30000000
→ P169 = 12, P170 = 3
Technology Option F01
1
Decimal places
8-digit P170
(00)971181
16
increments
9-39