Siemens SINUMERIK 840D sl Function Manual page 778

S3: Synchronous spindle
14.4 Points to note
Enable resynchronization
Setting the enabling signals closes the coupling at the current actual positions. The two
following NC/PLC interface signals are set:
DB31, ... DBX98.1 (coarse synchronism)
DB31, ... DBX98.0 (fine synchronism)
The following requirements must be fulfilled for resynchronization to work:
● The axis enabling signal must be set for the following spindle.
● The PLC must not set any synchronization disables for the following spindle:
DB31, ... DBX31.5 (Disable synchronization)
Resynchronize following spindle
Resynchronization is started for the relevant following spindle and commences as soon as the
low-high edge of following interface signal is detected:
DB31, ... DBX31.4 (resynchronization)
The NC acknowledges the detection of the edge by outputting the NC/PLC interface signal:
DB31, ... DBX99.4 (synchronization running)
The interface signal "Synchronization running" is reset if:
● synchronization of the following spindle has been completed up to the stage at which there
is synchronism at the setpoint end.
● the NST DB31, ... DBX31.4 (resynchronization) was reset.
Response of synchronous signals during additional movements for the following spindle
The superimposed component is calculated to establish the synchronism signals.
Example
Program code
N51 SPOS=0 SPOS[2]=90
N52 OUPDEF(S2,S1,1,1,"FINE","DV")
N53 COUPON(S2,S1,77)
N54 M0
N55 SPOS[2]=0 FA[S2]=3600
N56 M0
N60 M2=3 S2=500
778
Comment
; Offset=77°, "coarse", "fine" synchro-
nous run signals exist.
; Difference in speed, synchronism sig-
nals "coarse", "fine" are reported
; (note tolerances, see above)
; Offset=0°, "coarse", "fine" synchro-
nous run signals exist.
; difference in speed, synchronism sig-
nals "coarse", "fine" are reported.
; offset undefined, synchronism signals
"coarse", "fine" are reported.
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions