Detailed description
2.12 Block descriptions
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
217
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
DB31, ... DBX93.7 (Pulse enabled) the NST DB31, ... DBX61.7
(current regulator active) and DB31, ... DBX61.6 (speed regulator active) are deactivated.
• In case of rotating spindle and activated position controller the spindle with NST DB31, ...
DBX61.5 (position controller active) is changed over from star to delta, then it leads to the
alarm 25050 "Contour monitoring".
• Once the star/delta changeover has been initiated with FC17, it cannot be delayed by the
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.
Declaration of the function
STL representation
VAR_INPUT
YDelta: BOOL ; //Star = 0, delta = 1
SpindleIFNo: INT ; //Machine axis number
TimeVal: S5TIME ; //Time value
TimerNo : INT ; //User timer for changeover time
END_VAR
VAR_OUTPUT
Y: BOOL ; //Star contactor
Delta: BOOL ; //Delta contactor
END_VAR
VAR_IN_OUT
Ref: WORD ; //Block status word (instance)
END_VAR
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