Monitoring Of Synchronous Operation - Siemens SINUMERIK 840D Function Manual

S3: Synchronous spindle
19.1 Brief description
19.1.7

Monitoring of synchronous operation

Fine/coarse synchronism
In addition to conventional spindle monitoring operations, synchronous operation between the
FS and LS is also monitored in synchronous mode.
IS "Fine synchronism" (DB31, ... DBX98.0) or IS "Coarse synchronism" (DB31, ... DBX98.1) is
transmitted to the PLC to indicate whether the current position (AV, DV) or actual speed (VV)
of the following spindle lies within the specified tolerance window.
When the coupling is switched on, the signals "Coarse synchronism" and "Fine synchronism"
are updated when setpoint synchronism is reached.
862
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA