Siemens SINUMERIK 840D sl Commissioning Manual page 116

NCK start-up
10.2 System data
Machine data
Table 10-8 Cycle times: Machine data
Number Identifier
General ($MN_ ... )
10050 SYSCLOCK_CYCLE_TIME
10060 POSCTRL_SYSCLOCK_TIME_RATIO
10061 POSCTRL_CYCLE__TIME
10062 POSCTRL_CYCLE_DELAY
10063 POSCTRL_CYCLE_DIAGNOSIS
10070 IPO_SYSCLOCK_TIME_RATIO
10185 NCK_PCOS_TIME_RATIO
If you change the cycle times, check the behavior of the controller in all operating modes
before you finish commissioning.
Note
The smaller the cycle times (PROFIBUS DP cycle) chosen, the greater the control quality for
the drive and the better the surface quality on the workpiece.
116
CAUTION
Name / remarks
System clock cycle/only display data; is always
equal to the equidistant PROFIBUS DP cycle.
Note: For SINUMERIK solution line for display
only!
Factor for the position control cycle/is set fixed to
the factor 1.
Position Controller cycle
Position control cycle offset
[0] = DP cycle time
[1] = Position controller cycle offset
[2] = Position controller cycle offset + max.
computation time needed by the position controller
Factor for the interpolator cycle/can be freely
selected in integer multiples.
Computation time ratio NCK
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Reference
IBN CNC: NCK, PLC, drive