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
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