Siemens SINAMICS S120 Function Manual page 283

The alarm is also generated if, during an activated function (reference mark search or
measuring probe evaluation) a fault is signaled using the encoder status word.
If the "position control" function module is selected, these parameters (p2508 to p2511) are
preassigned with "0". If the "basic positioner" function module is selected, the functions
"reference mark search" (for the function reference point search) and "measuring probe
evaluation" (for the function flying referencing) are initiated by the function module basic
positioner and the feedback signal (r2526, r2523) is fed back to this (see also:
Commissioning Manual, section "Control and status words for encoders").
Function diagrams (see SINAMICS S120/S150 List Manual)
● 4010 Position actual value conditioning
● 4720 Encoder interface, receive signals, encoder 1 ... 3
● 4730 Encoder interface, send signals, encoder 1 ... 3
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p2508 BI: LR activate reference mark search
● p2509 BI: LR activate measuring probe evaluation
● p2510 BI: LR measuring probe evaluation, selection
● p2511 BI: LR measuring probe evaluation edge
● p2517 LR direct probe 1 input terminal
● p2518 LR direct probe 2 input terminal
● r2523 CO: LR measured value
● r2526 CO/BO: LR status word
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Function modules
7.8 Closed-loop position control
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