Spindle Gear Stage 0 - Siemens SINUMERIK 828D Function Manual

S1: Spindles
16.4 Configurable gear adaptation
• The "Ramp­function generator rapid stop" signal must be reset by the PLC before the gear stage change is
completed by the PLC.
• The process sequence of the gear stage change is ended during NC reset without any alarm output.
The gear stage output with NC/PLC IS:
DB31, ... DBX16.0-16.2 (Actual gear stage A to C)
is applied by the NC.
Star- / Delta switchover with FC17
Digital main spindle drives can be switched in both directions between star and delta using FC17, even when the
spindle is running. This automatic switchover is controlled by a defined logic circuit in FC17, which provides the
user with a configurable switchover time for the relevant spindle.
Further instructions on function block FC17 can be found under:
References:
Function Manual Basic Function; PLC Basic Program (P3)
16.4.2

Spindle gear stage 0

Technical background
For machine's where the spindle load gear can be changed over, situations can occur where the gear train
between the motor and load (workpiece/tool) is interrupted. This state can occur, e.g. when pressing Reset or
Emergency Stop while performing a gear stage change or when the machine is commissioned for the first time
while it is being installed. The control must identify this state where the gear train is open and the next gear stage
change request must be unconditionally executed.
Function
When the gear is disengaged, the binary-coded value "0" ( ≙ gear stage 0) is transferred to the NC from the PLC
using the interface signal bits DB31, ... DBX16.0-2 (actual gear stage A to C):
DB31, ... DBX16.0-2 = 0
The value is used by the control to identify the state where the gear train is open.
Effects on the gear stage change
Gear stage change in the part program
The actual gear stage signaled from the PLC is read by the NC when starting a part program. If, at this instant in
time, a value of "0" is read for the actual gear stage, then the next gear stage change is executed and the gear
stage change dialog is performed by the PLC. If a value greater than "0" is read, then already in the program a
comparison is made between the requested and active gear stage. If both gear stages are the same, the gear
stage is not changed and a possibly programmed path motion is not interrupted.
1300
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions