Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 User 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