Siemens S7-300 appendix CPU 312C, Technical data

Technical data of CPU 31xC 6.2 CPU 312C

6.2CPU 312C

Technical data

Table 6-3		Technical data of CPU 312C
Technical data
CPU and version
Order number			6ES7 312-5BD01-0AB0
•	Hardware version		01
•	Firmware version		V2.0
•	Associated programming package		STEP 7 as of V 5.2 + SP 1
			(please use previous CPU for STEP 7 V 5.1 +
			SP 3 or later)
Memory
RAM
•	Integrated		16 KB
•	Expandable		No
Load memory			Plugged in with MMC (max. 4 MB)
Data storage life on the MMC			At least 10 years
(following final programming)
Buffering			Guaranteed by MMC (maintenance-free)
Execution times
Processing times of
•	Bit operations		Min. 0.2 μs
•	Word instructions		Min. 0.4 μs
•	Fixed-point arithmetic		Min. 5 μs
•	Floating-point arithmetic		Min. 6 μs
Timers/counters and their retentivity
S7 counters			128
•	Retentive memory		Configurable
•	Default		from C0 to C7
•	Counting range		0 to 999
IEC Counters			Yes
•	Type		SFB
•	Number		unlimited (limited only by RAM size)
S7 timers			128
•	Retentive memory		Configurable
•	Default		Not retentive
•	Timer range		10 ms to 9990 s

CPU 31xC and CPU 31x, Technical data	6-3
Manual, Edition 08/2004, A5E00105475-05