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Definitions:
● Position tracking is continued
The behavior of the position tracking during the changeover is the same as it would have
been had the data set not been changed.
● Position tracking is reinitiated (The position actual value can change when the
changeover is made!)
The response at switchover is the same as the response 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 message is generated.
● 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) was also automatically activated.
The "Basic positioner" function module can be activated via the commissioning wizard or the
drive configuration (configuring DDS) (configuration "Closed-loop control structure" -
checkbox "Basic positioner").
Configuring the position tracking load gear function
The "Position tracking load gear" function can be configured in the following STARTER
screens:
1. In the "Mechanical system configuration" screen in the commissioning wizard.
2. In the project navigator under "Drive" > "Technology" > "Position control" in the
"Mechanical System" screen.
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
Functions, monitoring and protective functions
9.4 Extended functions
643
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