Siemens SINUMERIK 828D Function Manual page 1027

Boundary 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 pulse on the drive, the NST DB31, ... .DBX93.7 (Pulse enabled)
deactivates simultaneously the IS DB31, ... .DBX61.7 (current controller active) and DB31, ... .DBX61.6
(speed controller active).
• If a changeover from star to delta takes place while the spindle is rotating and the spindle position controller is
switched on, IS "Position controller active" (DB31, ... DBX61.5), this triggers alarm 25050 "Contour
monitoring".
• Once the star-delta changeover has been initiated with FC 17, 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:
SpindleIFNo:
TimeVal:
TimerNo :
END_VAR
VAR_OUTPUT
Y:
Delta:
END_VAR
VAR_IN_OUT
Ref:
END_VAR
Description of formal parameters
The table below lists all formal parameters of the YDelta function:
Typ
Signal
e
YDelta I
SpindleIFNo I
TimeVal I
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
BOOL; //Star = 0, delta = 1
INT; //Machine axis number
S5TIME ; //Time value
INT; //User timer for changeover time
BOOL; //Star contactor
BOOL; //Delta contactor
WORD ; //Block status word (instance)
Type Value range
BOOL
INT 1 ...
S5time 0 ...
P3: Basic PLC Program for SINUMERIK 840D sl
Comment
= Star
= Triangle
The changeover edge of the signal
initiates the changeover operation.
Number of the axis interface
declared as a spindle
Switchover time
13.13 Block descriptions
1027