PROFIBUS DP Communication
8.3 Creating a PROFIBUS configuration
Manual
246
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Master application cycle T
MAPC
The "Master application cycle T
MAPC
parameter specifies the integer ratio between the master
application (NC position controller) and the isochronous DP cycle.
Using ratios other then 1:1, the dead times of the position controller can be reduced if NC
hardware of the lower performance range is used.
NOTICE
On a DP slave S120 used with SINUMERIK 840Di sl, the ratio between the master
application cycle TMAC and DP cycle time TDP must be 1:1.
Master application cycle = DP cycle
Dialog: Continuation
Tab: Cycle synchronization
Master application cycle [ms]:
Factor: 1
Actual value acquisition Ti
The actual-value acquisition Ti parameter defines the time at which the actual value (actual
position value) can be read in from a DP slave S120.
Note
You are strongly recommended to use the same value for the time of actual value acquisition
Ti for all DP slaves S120, in particular if the axes interpolate.
NOTICE
The following condition must be observed for the time of actual value acquisition TI:
DP cycle >= actual value acquisition >= base time
Dialog: Continuation
Tab: Cycle synchronization
Actual value acquisition [ms]:
Factor: Factor
