Siemens S7-300 appendix Technical data CPU 314C-2 PtP CPU 314C-2 DP

				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
Number of function modules and
communication processors you can
operate
•	FM	Max. 8
•	CP (PtP)	Max. 8
•	CP (LAN)	Max. 10
Time-of-day		CPU 314C-2 PtP		CPU 314C-2 DP
Real-time clock		Yes (HW clock)
•	Buffered	Yes
•	Buffered period	Typically 6 weeks (at an ambient temperature of 40 °C)
• Behavior of the clock on expiration		The clock keeps running, continuing at the time-of-day it had when power was
	of the buffered period	switched off.
•	Accuracy	Deviation per day < 10 s
Operating hours counter		1
•	Number	0
•	Value range	2 31 hours
		(if SFC 101 is used)
•	Granularity	1 hour
•	Retentive	Yes; must be manually restarted after every restart
Clock synchronization		Yes
•	In the PLC	Master
•	On MPI	Master/slave
S7 signaling functions		CPU 314C-2 PtP		CPU 314C-2 DP
Number of stations that can log in for		Max. 12
signaling functions (e.g. OS)		(depends on the number of connections configured for PG / OP and S7 basic
		communication)
Process diagnostics messages		Yes
• Simultaneously enabled interrupt S		Max. 40
	blocks
Testing and commissioning functions		CPU 314C-2 PtP		CPU 314C-2 DP
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

CPU 31xC and CPU 31x, Technical data	6-23
Manual, Edition 08/2004, A5E00105475-05