Function modules
8.7 Position control
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
499
● Position tracking is continued
The behavior of the position tracking during the changeover is the same as it would be if
the data set had not even been changed.
● Position tracking is newly initiated (the position actual value can change when the
changeover is made!)
The behavior during changeover is the same as the behavior after a POWER ON. The
position value read by the absolute encoder is compared to the stored value. If the
position difference is within the tolerance window (p2722), the position is corrected
correspondingly; if it is outside the range, a corresponding fault F07449 is output
● Position tracking is reset (the position actual value can change when the changeover is
made!)
The stored absolute value is rejected and the overflow counter is reset to zero.
● Position tracking is not calculated (the position actual value changes when the
changeover is made!)
The saved absolute value of the position tracking - including the offset correction from the
dissolved DDS - is not used.
● Additional information: The position tracking memory is only available once for each EDS.
Commissioning position tracking load gear using STARTER
The position tracking function can be configured in the "Mechanical system" screen for
"Position control" in STARTER.
The "Mechanical system" screen for "Position control" is not accessible unless the function
module "Basic positioner" is activated (r0108.4 = 1) which means that the function module
"Position control" (r0108.3 = 1) is automatically activated as well.
The "Basic positioner" function module can be activated via the commissioning wizard or the
drive configuration (configure DDS) (configuration "Closed-loop control structure" - checkbox
"Basic positioner").
Configuring the position tracking load gear function
Configure the "Position tracking load gearbox" function in the following screens of the
STARTER commissioning tool:
● In the "Mechanical system configuration" screen in the commissioning wizard.
OR
● In the project navigator under "Drive" > "Technology" > "Position control" in the
"Mechanical System" screen.
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