Siemens S7-300 appendix 2nd interface CPU 314C-2 PtP CPU 314C-2 DP, DP master

					Technical data of CPU 31xC
				6.5 CPU 314C-2 PtP and CPU 314C-2 DP
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	Yes
	–	As client	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

CPU 31xC and CPU 31x, Technical data	6-25
Manual, Edition 08/2004, A5E00105475-05