Siemens SINUMERIK 840Di Function Manual page 1118

Detailed description
2.12 Block descriptions
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 alarm 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
Changeover does not occur if the spindle is in an axis mode, such as M70, SPOS.
Supplementary conditions
Star/delta changeover on digital main spindle drives initiates a process, which contains
closed-loop control sequences. Since the closed-loop control system supports automatic
star/delta changeover, certain restrictions should be noted:
• Due to the automatic deactivation of the pulses on the drive, IS "Current controller active"
• If a changeover from star to delta takes place while the spindle is rotating and the spindle
• Once the star/delta changeover has been initiated with FC17, the changeover of the
2-206
(DB31, ... DBX61.7) and "Speed controller active" (DB31, ... DBX61.6) are deactivated
simultaneously to IS "Pulses enabled" (DB31, ... DBX93.7).
position controller is switched on, IS "Position controller active" (DB31, ... DBX61.5), this
triggers alarm 25050 "Contour monitoring".
star/delta contactor cannot be delayed by the user. The user can implement this signal
interaction with PLC logic.
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0