Adjusting Absolute Measuring Systems - Siemens SIMODRIVE 611 universal Function Manual

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6.2.7

Adjusting absolute measuring systems

General Axes with absolute value encoders automatically obtain their reference
information position without any axis motion after power–on.
Prerequisites:
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Adjusting the An absolute value encoder should be adjusted once when commissio-
absolute value ning the axis or after opening the
encoder mechanical coupling between the measuring system and mechanical
system, for example, after:
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Note
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E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
6.2 Positioning mode (P0700 = 3, from SW 2.1)
There is an absolute value encoder (single–turn/multi–turn absolute
value encoder) (P0175 = 0)
Absolute value encoder is considered
to have been adjusted (P0175 = 3 for
indirect measuring system P0175 = 4 for direct measuring system)
Replacing the measuring system and/or motor
Changing the gearbox ratio (when changing the gearbox factors)
Selection, "parking axis" (if another EnDat encoder was connected)
"SIMODRIVE 611 universal" can only identify if the mechanical
coupling between the measuring system and mechanical system is
released, if it is powered up.
When a parameter set is changed–over in operation (e.g. a gear
ratio is changed), the "not adjusted" information is lost at
power–down if "save to Feprom" is not explicitly initiated.
Before SW 4.1:
If a parameter set changeover was carried out with an adjusted
absolute encoder for a particular motor measuring system, then the
encoder must be re–adjusted.
From SW 4.1:
Using P0239, the behavior for a parameter set changeover can be
set for a motor measuring system.
P0239 = 0: Behavior as before SW 4.1 (standard)
P0239 = 1: For a parameter set changeover, it is only necessary
to adjust the encoder if the mechanical ratio of
P0237/P0238 has been changed.
6 Description of the Functions
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