Siemens SINUMERIK 840Di Function Manual page 1375

Fig. 2-31 Star/delta switchover
More information about motor speed adjustment can be found in:
References:
/FB/ Description of Functions, Basic Machine; Spindles (S1);
Section: Configurable Gear Adjustments
/FB/ Description of Functions, Basic Machine; Velocities, Setpoint/Actual Value Systems,
Closed-Loop Control (G2)
Error message
If the parameter "SpindleIFNo" is not in the permissible range, the PLC is stopped with
output of interrupt message number 401702.
Special features
When parameterizing "TimeVal" with the value 0, a default value of 100 ms is used. With a
value of less than 50 ms, the minimum setting of 50 ms is applied.
The block must be called unconditionally.
Note
Switchover does not take place if the spindle is in an axis mode such as M70, SPOS.
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Detailed Description
2.12 Block descriptions
2-181