Siemens S7-300 appendix Technical data

Technical data of CPU 31xC 6.3 CPU 313C

Technical data

Process diagnostics messages			Yes
• Simultaneously enabled interrupt S blocks			Max. 20
Testing and commissioning functions
Status/control variables			Yes
•	Variables		Inputs, outputs, memory bits, DBs, timers,
			counters
•	Number of variables		Max. 30
	– of those as status variable		Max. 30
	– of those as control variable		Max. 14
Forcing			Yes
•	Variables		Inputs, outputs
•	Number of variables		Max. 10
Block status			Yes
Single step			Yes
Breakpoints			2
Diagnostic buffer			Yes
• Number of entries (not configurable)			Max. 100
Communication functions
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
• 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

CPU 31xC and CPU 31x, Technical data	6-11
Manual, Edition 08/2004, A5E00105475-05