Siemens SINUMERIK 840D sl Function Manual page 188

G3: Cycle times
3.4 SINUMERIK 840Di with PROFIBUS DP
Figure 3-2
Key to Fig. above:
TLag:
TDP:
TDX:
TM:
GC:
R:
Dx:
MSG:
RES:
Conditions and recommendations for MD10062
MD10062 $MN_POSCTRL_CYCLE_DELAY (position control cycle offset)
The position controller cycle offset (T
fulfilled within a PROFIBUS-DP/system cycle:
188
Position control cycle offset compared to PROFIBUS-DP cycle
Computing time requirements for the position controller
DP cycle time: DP cycle time
Data exchange time: Total transfer time for all DP slaves
Master time: Offset of the start time for NC position control
Global Control: Broadcast message for cyclic convergence of the equidistance between DP
master and DP slaves
CPU time
Useful data exchange between the DP master and DP slaves
Acyclic services (e.g. DP/V1, pass token)
Reserve: "Active pause" until the isochronal (equidistant) cycle has expired
) must be set such that the following conditions are
M
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions