Control functions
7.5 Internal position control (IPos)
SINAMICS V90, SIMOTICS S-1FL6
240 Operating Instructions, 04/2019, A5E36037884-007
Configuring the linear/modular axis
You can choose to use a linear axis or a modular axis depending on your actual application.
The linear axis has a restricted traversing range, which is the factory setting of the
SINAMICS V90 servo drive.
The modular axis has an unrestricted traversing range. The value range of the position
repeats itself after a value is specified in p29245. You can use the modular axis by setting
the following parameters additionally.
p29245 0 to 1 0 -
• 0: linear axis
• 1: modular axis
p29246 1 to
2147482647
360000 LU Modular range
Note
After modifying parameter p29245, you must perform the referencing operation again.
Generally, backlash occurs when the mechanical force is transferred between a machine
part and its drive:
If the mechanical system was to be adjusted/designed so that there was absolutely no
backlash, this would result in high wear. Thus, backlash can occur between the machine
component and the encoder. For axes with indirect position sensing, mechanical backlash
results in a false traversing distance because the axis, at direction reversal, travels either too
far or not far enough corresponding to the absolute value of the backlash.
Note
Pre-conditions for backlash compensation
The backlash compensation is active after
the axis has been referenced for incremental measuring system. Refer to Section
"Referencing (Page 241)" for detailed information about referencing.
the axis has been adjusted for absolute measuring system. Refer to Section "
absolute encoder (Page 207)" for reference.
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