Siemens SINUMERIK 840D sl Function Manual page 1479

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.
Restrictions
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:
• Owing to the automatic deactivation of the pulse in the drive, simultaneously with the NST
• In case of rotating spindle and activated position controller the spindle with NST DB31, ...
• Once the star/delta changeover has been initiated with FC17, it cannot be delayed by the
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
DB31, ... DBX93.7 (Pulse enabled) the NST DB31, ... DBX61.7
(current regulator active) and DB31, ... DBX61.6 (speed regulator active) are deactivated.
DBX61.5 (position controller active) is changed over from star to delta, then it leads to the
alarm 25050 "Contour monitoring".
user, e.g., by waiting until the star/delta contactors change over during the course of
operation. The user can implement this signal interaction with PLC logic.
Detailed description
2.12 Block descriptions
205