Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 135)

Technical data of CPU 31xC
6.5 CPU 314C-2 PtP and CPU 314C-2 DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
6-25
Technical data
CPU 314C-2 PtP CPU 314C-2 DP
MPI
Number of connections 12
Services
• PG/OP communication Yes
• Routing No Yes
• Global data communication Yes
• S7 basic communication Yes
• S7 communication
–
As server
– As client
Yes
No (but via CP and loadable FBs)
• Transmission rates max. 187.5 kbps
2nd interface CPU 314C-2 PtP CPU 314C-2 DP
Type of interface Integrated RS422/RS485 interface Integrated RS485 interface
Physics RS 422/485 RS 485
electrically isolated Yes Yes
Interface power supply (15 to 30 VDC) No Max. 200 mA
Number of connections None 12
Functionality
• MPI No No
• PROFIBUS DP No Yes
• Point-to-point communication Yes No
DP master
Number of connections – 12
Services
• PG/OP communication – Yes
• Routing – Yes
• Global data communication – No
• S7 basic communication – No
• S7 communication – No
• Constant bus cycle time – Yes
• SYNC/FREEZE – Yes
• Enable/disable DP slaves – Yes
• DPV1 – Yes
• Transmission rates – Up to 12 Mbps
• Number of DP slaves per station – Max. 32
• Address area – Max. 1 KB I / 1 KB O
• User data per DP slave – max. 244 bytes I / 244 bytes O