Siemens S7-300 appendix Interfaces CPU 313C-2 PtP CPU 313C-2 DP 1st interface, Functionality

					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
Communication functions			CPU 313C-2 PtP		CPU 313C-2 DP
PG/OP communication			Yes
Global data communication			Yes
• Number of GD circuits			4
• Number of GD packets			Max. 4
	–	Sending stations	Max. 4
	–	Receiving stations	Max. 4
• Length of GD packets			max. 22 bytes
	–	Consistent data	22 bytes
S7 basic communication			Yes (server)
• User data per request			max. 76 bytes
	–	Consistent data	76 bytes (for X_SEND or X_RCV)
			64 bytes (for X_PUT or X_GET as the server)
S7 communication
•	As server		Yes
•	as client		Yes (via CP and loadable FBs)
• User data per request			max. 180 bytes (with PUT/GET)
	–	Consistent data	64 bytes
S5-compatible communication			Yes (via CP and loadable FCs)
Number of connections			Max. 8
can be used for
•	PG communication		Max. 7
	–	Reserved (default)	1
	–	Configurable	from 1 to 7
•	OP communication		Max. 7
	–	Reserved (default)	1
	–	Configurable	from 1 to 7
•	S7-based communication		Max. 4
	–	Reserved (default)	4
	–	Configurable	from 0 to 4
Routing			No		Max. 4
Interfaces			CPU 313C-2 PtP		CPU 313C-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 communication		No

CPU 31xC and CPU 31x, Technical data	6-17
Manual, Edition 08/2004, A5E00105475-05