Siemens CPU 312 - Page 137

Technical data of CPU 31xC
6.5 CPU 314C-2 PtP and CPU 314C-2 DP
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
6-25
Technical data
CPU 314C-2 PtP CPU 314C-2 DP
Interfaces CPU 314C-2 PtP CPU 314C-2 DP
1st interface
Type of interface Integrated RS485 interface
Physics RS 485
electrically isolated No
Interface power supply (15 to 30 VDC) Max. 200 mA
Functionality
• MPI
Yes
• PROFIBUS DP
No
• Point-to-point connection
No
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 connection
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