Measuring Probe Evaluation And Reference Mark Search - Siemens SINAMICS S120 Function Manual

Function modules
9.7 Position control
9.7.4

Measuring probe evaluation and reference mark search

Function description
The "Reference mark search" and "Probe evaluation" functions can be initiated and carried out
via binector inputs p2508 and p2509. Binector inputs p2510 and p2511 define the mode for
measurement probe evaluation.
The probe signals are recorded via the encoder status and control word. To speed up signal
processing, direct measuring probe evaluation can be activated by selecting the input terminals
for probes 1/2 via p2517 and p2518. Measuring probe evaluation is carried out in the position
controller cycle, whereby the set send cycle of the controller (r2064[1]) must be an integer
multiple of the position controller cycle (p0115[4]).
The system outputs a message if the same probe input is already being used (see also p0488,
p0489, p0580, and p0680).
The appropriate function is started using a 0/1 edge at the appropriate input p2508 or p2509 via
the encoder control word. Status bit r2526.1 (reference function) signals that the function is
active (feedback from the encoder status word). Status bit r2526.2 (measurement value valid)
shows the presence of the measurement required r2523 (position for reference mark or
measurement probe).
Once the function is complete (position determined for reference mark or measurement probe),
r2526.1 (reference function active) and r2526.2 (measurement valid) continue to remain active
and the measurement is provided by r2523 until the corresponding input p2508 or p2509 is
reset (0 signal).
If the function (reference mark search or measuring probe evaluation) has still not been
completed and the corresponding input p2508 or p2509 is reset, then the function is interrupted
via the encoder control word and status bit r2526.1 (reference function active) is reset via the
encoder status word.
If both binector inputs p2508 and p2509 are simultaneously set, this causes the active function
to be interrupted and no function is started. This is indicated using alarm A07495 "reference
function interrupted" and remains until the signals at the binector inputs are reset. 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 "reference mark
search" (for search for reference point) and "measurement probe evaluation" (for the flying
referencing function) functions are initiated by the "basic positioner" function module and
feedback (r2526, r2523) returned to this.
Function diagrams (see SINAMICS S120/S150 List Manual)
● 4010
● 4720
● 4730
460
Position control - Actual position value processing (r0108.3 = 1)
Encoder evaluation - Encoder interface, receive signals, encoders 1 ... 3
Encoder evaluation - Encoder interface, send signals, encoders 1 ... 3
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions