Siemens CPU 313C User Manual

Memory concept
4.2 Memory functions
CPU 31xC and CPU 31x, Technical Data
4-12 Manual, 01/2006 Edition, A5E00105475-06
4.2.3.3 Deleting blocks
Deleting blocks
When you delete a block, it is deleted from load memory. In STEP 7, you can also delete
blocks with the user program (DBs also with SFC 23 "DEL_DB"). RAM used by this block is
released.
4.2.3.4 Compressing blocks
Compressing blocks
When data are compressed, gaps which have developed between memory objects in load
memory/RAM as a result of load/delete operations will be eliminated. This releases free
memory in a continuous block. Data compression is possible when the CPU is in RUN or in
STOP.
4.2.3.5 Promming (RAM to ROM)
Promming (RAM to ROM)
When writing the RAM content to ROM, the actual values of the DBs are transferred from
RAM to load memory to form the start values for the DBs.
Note
This function is only permitted when the CPU is in STOP mode. Load memory is cleared if
the function could not be completed due to power loss.

Siemens CPU 313C Specifications

General

MPI Interface	Yes
Number of digital inputs	24
Number of digital outputs	16
Number of analog inputs	4
Number of analog outputs	2
Supply voltage	24 V DC
High-speed counters	Yes
Bit Operations Execution Time	0.1 µs
Word Operations Execution Time	0.2 µs
Power Consumption	5 W
Dimensions (W x H x D)	40 x 125 x 130 mm
Operating Temperature	0 to 60 °C
Communication Interfaces	MPI
Programming Languages	LAD, FBD, STL
Product type designation	CPU 313C
Weight	490 g