08.2012
Technology Option F01
Siemens AG
6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES
Compendium Motion Control
9-31
By how many increments must the absolute position be corrected?
Delta = 27962026 inc - 10 rev 8192
= 27880106 inc
×
inc
rev
How many revolutions does that represent and what is the remainder?
Delta_ rev =
rev = 3403 rev
27880106
8192
Delta_ rem = (27880106 inc - 8192
Delta_ rev) = 2730 inc
inc
rev
×
Set Zero Offset
Revolutions P146.1
-3403
The setting is added on allowing for the overflows of the representable
value range. The value range is between "zero" and the maximum
encoder resolution even after a zero offset is set.
When
EnDat
encoders are used, the zero offset can be transferred
from parameter
P146.1
into the encoder EEPROM.
Save Zero Offset in Encoder EEPROM
Par. Setting
Description
P60
5
Switch to drive settings
P149.2
B25
Save zero offset on encoder
P60
1
Return to ready for operation
The offset setting in
P146.1
is cleared and stored on the encoder. It is
important that the correct number of lines is specified in
P148.1
→
if
you do not use a default encoder, we recommend that you call up the
EnDat self-startup function before saving the zero offset (
P149.2
xAxx
and
P149.1
xxx1)
If you store an offset in the encoder while an incorrect number of pulses
per revolution is being entered in P148.1 the motor encoder will
become incorrectly oriented and the motor may overspeed.
The fine offset within one revolution can be set with parameter P184
[330.7]. If the technology is used, the fine offset must be defined in
machine data MD10
[815.4].
NOTE
WARNING
