Siemens SINUMERIK 840Di sl Commissioning Manual page 233

Key to Fig. above:
● T
● T
● T
● T
● T
● T
● GC:
● R:
● Dx:
● DPV1:
● G T R:
● ①
● ②
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
:
MAPC
Master application cycle: NC-Position controller cycle
the following is always valid for SINUMERIK 840Di sl: T
:
DP
DP cycle time: DP cycle time
:
DX
Data exchange time: Total transfer time for all DP slaves
:
M
Master time: Offset of the start time for NC position control
:
I
Input time: Time of the actual value acquisition. The actual values are transferred to the
DP-Master in the next DP cycle.
:
O
Output time: Time of the setpoint acceptance. The setpoints were generated by the DP-
Master-Application in the previous DP-Cycle.
Global control message frame (broadcast message frame) for cyclic synchronization of
the equidistance between the DP master and DP slaves
Computation time for speed or position control
Useful data exchange between the DP master and DP slaves
After cyclic communication, an acyclic service is sent, if the token holding time T
not yet been exceeded. T
E: GAP
An attempt is made during this time to accept new active stations.T:
T: TOKEN
The token passing is either to itself or other masters.
R: RES
The reserve is used as an "Active break" for the station to send the token to itself until the
equidistant cycle expires.
The actual values for the current DP-Cycle/position control cycle are transferred from the
DP-Slave-Drives to the NC position controller.
The setpoints computed by the NC position controller are transferred to the DP-Slave-
Drives.
is calculated by the engineering system.
TH
PROFIBUS DP Communication
8.1 General information
= T
MAPC DP
has
TH
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