Siemens SIMATIC NET CP 443-5 Extended Manual page 18

Application and functions
1.4 Performance data
Diagnostics requests
As a DP master (class 1), the CP 4435 supports diagnostics requests of a DP master (class
2).
Note
Default value for the startup parameter "Monitoring time for transfer of parameters to
modules"
In some situations, it is necessary to increase the default value for the startup parameter
"Monitoring time for transfer of parameters to modules" in the Properties dialog of the CPU:
- When there is a large number of modules (DP slaves) configured that can be assigned
parameters
- When a high value is configured for the constant bus cycle time in the network properties of
the PROFIBUS DP line
CiR functionality
The numbers of connections etc. shown in Table General characteristic data of DP mode
(Page 17) also apply to the entire DP master system if there is a configured DP slave
expansion (CiR functionality).
If you specify the properties of a CiR object in the DP master system of the CP 4435
Extended in STEP 7, these values are included in checks performed by STEP 7.
The configurable properties relate to:
● The number of DP slaves and modules you can insert in a DP slave
● The number of input and output bytes that can still be configured in RUN.
(see also manual /5/ (Page 42))
See also
Characteristic data of the DP interface (Page 17)
18
CP 443-5 Extended
Manual, 11/2018, C79000-G8976-C162-09