CM 1542-5
Manual, 11/2014, C79000-G8976-C290-02
13
Functional characteristics
3
Note
Measured values of transfer or reaction times
Measurements of transfer and reaction times in Ethernet, PROFIBUS and PROFINET
networks for a series of configurations can be found on the Internet
http://support.automation.siemens.com/WW/view/en/25209605
3.1
Transmission speeds supported
The transmission speed is set with the SIMATIC STEP 7 configuration software.
Note
Remember the cable length
The permitted cable length must be kept to depending on the transmission speed.
Refer to the information in the section Technical specifications (Page 33)
3.2
Characteristic data of the DP interface
General characteristic data
No special program blocks are required for DP mode. The interfacing to the distributed I/O is
by direct I/O access or using program blocks (SFCs/SFBs) of the CPU.
Table 3- 1
General characteristic data of DP mode
Characteristic
Explanation / values
Number of operable DP slaves
125
Max. size of the input area of all DP slaves
8 Kbytes
Max. size of the output area of all DP slaves
8 Kbytes
Maximum number of inputs per DP slave
244 bytes
Maximum number of outputs per DP slave
244 bytes
Max. size of the consistent area for a module
128 bytes
