01/2007
8.3 Creating a PROFIBUS configuration
8-185
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
If you are using both PROFIBUS connections, we recommend the following
distribution of DP slaves:
S PROFIBUS(1): Interface (X101) corresponding to slot X2
– NC–specific I/Os
– Drives
– ADI4
S PROFIBUS(2): Interface (X102) corresponding to slot X1
– PLC–specific I/Os
– Machine control panel, e.g. MCP 483
8.3.3 Final parameterization of the isochronous DP slaves
Once you have included the DP slaves in the configuration and parameterized
them individually, for concluding parameterization of the isochronous DP com-
munication of the PROFIBUS(1): interface (X101) corresponding to slot X2, you
must set the following parameters of the isochronous DP slaves in two separate
stages:
Step1:
S Activation of the equidistant DP cycle
S Equidistance master cyclic component T
DX
Step2:
S Equidistant DP cycle T
DP
S Master application cycle T
MAPC
S Actual value acquisition T
I
S Setpoint acceptance T
O
An overview of the various times of a DP cycle is shown in Fig. 8-2, Page 8-177.
Note
The procedure for assigning the final parameters for isochronous DP
communication is exemplified by one DP slave S120. Proceed in the same
manner for other isochronous DP slaves, e.g., SIMODRIVE 611U, ADI4; etc.
Notice
If DP slave ADI4 interfaces are present in an S7 project on which final
parameterization is to be performed, certain boundary conditions must be
observed. See also:
References /ADI4/ Analog drive interface for four axes
Section: Parameterization
Parameterization of DP communication
Boundary conditions
8 PROFIBUS DP Communication
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