Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP User Manual

Memory concept
6
6.1 6.1 Memory areas and retentive address areas
6.1.1 Technology CPU memory areas
Introduction
The memory of the Technology CPU is divided into three areas:
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Figure 6-1 Technology CPU memory areas
Load memory
The load memory is located on a micro memory card (MMC). It is used to store code blocks,
data blocks and system data (configuration, connections, module parameters, technology
system data etc.).
For the Technology CPU, the size of the load memory corresponds to the size of the MMC
minus approx. 3 MB. The 3 MB are required for the integrated technology and are therefore
not available to the user.
Blocks that are identified as not relevant for the execution are stored exclusively in the load
memory.
You can also store all the configuration data for your project on the MMC.
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02
6-1

Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP Specifications

General

Programming Language	STEP 7
Power Supply	24 V DC
Number of DP masters	1
Processable Technology objects	Yes
Number of counters	256
Number of timers	256
S7 communication	Yes
Number of connections for S7 communication, max.	16
PG/OP communication	Yes
Global data communication	Yes
Integrated DP interface	Yes
Integrated PROFINET interface	No
SIMATIC Computing Platform	No
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Communication	PROFIBUS DP
Cycle Time	0.1 ms
Engineering with	STEP 7
Backup available	Yes
Transmission rate, max.	12 Mbit/s