Siemens SINUMERIK 840D sl Function Manual page 1658

Detailed Description
2.3 Configurable gear adaptation
Spindle response after a gear step change
How the spindle behaves once the gear step has been changed depends on the following
initial conditions:
• If the spindle was in the stop state before the gear step change (M5, FC18: "Stop rotate
• If a direction of rotation
Special points to be noted
The following points must be observed on gear step change:
• The gear step change is not terminated by selecting
• The "Rampfunction generator rapid stop" signal must be reset by the PLC before the gear
• The gear step change procedure is terminated without an alarm output on an NC reset.
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:
Literature:
/FB1/ Function Manual Basic Functions; PLC Basic Program (P3)
48
spindle"), in positioning or axis mode, M5 (spindle stop) is active after completion of the
gear step change.
(M3, M4, or FC18: "Start spindle rotation"), then the last speed and direction of rotation will
become active again after the gear step change. In the new gear step, the spindle
accelerates to the last spindle speed programmed (S value).
The next block in the part program can be executed.
NC/PLC IS:
DB31, ... DBX20.1 (Ramp-up switchover to V/f mode).
Setpoint 0 is output.
The acknowledgment of the gear step change is carried out as usual
by the NC/PLC IS:
DB31, ... DBX16.3 (Gear changed).
step change is completed by the PLC.
The gear step output with NC/PLC IS:
DB31, ... DBX16.0-16.2 (Actual gear step A to C)
is applied by the NC.
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0