Siemens S7-300 appendix DP master

Technical data of CPU 31xC

6.4 CPU 313C-2 PtP and CPU 313C-2 DP

Technical data

			CPU 313C-2 PtP	CPU 313C-2 DP
MPI
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)
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	8
Functionality
•	MPI		No	No
•	PROFIBUS DP		No	Yes
•	Point-to-point communication		Yes	No
DP master
Number of connections			–	8
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

6-18	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05