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

Function modules
7.7 Closed-loop position control
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p2530
• p2532
• p2542
• p2543
• p2544
• p2545
• p2546
• p2547
• p2548
• p2551
• p2554
• r2563
• r2683.8
• r2683.9
• r2684
7.7.5

Measuring probe evaluation and reference mark search

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 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).
446
CI: LR position setpoint
CI: LR actual position value
LR standstill window
LR standstill monitoring time
LR positioning window
LR position monitoring time
LR dynamic following error monitoring tolerance
LR cam switching position 1
LR cam switching position 2
BI: LR setpoint message present
BI: LR travel command message active
CO: LR following error, dynamic model
CO/BO: EPOS status word 1; actual position value <= cam switching
position 1
CO/BO: EPOS status word 1; actual position value <= cam switching
position 2
CO/BO: EPOS status word 2
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions