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

Memory concept
6.2 Memory functions
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.
Caution
If you delete a technology data block, the associated drive stops.
Remedy: Switch the CPU to STOP before you delete the technology data block.
Compression
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.
Promming
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.
S7-300 CPU Data: CPU 315T-2 DP
6-12 Manual, 12/2005, A5E00427933-02

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

Summary

Product Overview

Integrated technology of Technology CPU

Details the integration of technology and motion control functions within the SIMATIC CPU.

Setting up an S7-300 with a Technology CPU

Configuring

Covers configuration aspects like single-tier setup and subnets.

Addressing

Status and error displays of the Technology CPU

Explains the meaning of CPU LEDs for status and error indication.

Communication with the S7-300

MPI/DP interface (X1)

DP(DRIVE) interface (X3)

Communication services on the MPI/DP interface (X1)

Provides an overview of communication services like PG, OP, S7, and Global data communication.

Routing

Memory concept

Memory areas and retentive address areas

Memory functions

Covers functions for generating, modifying, or deleting programs and blocks.

CPU memory reset and restart

Cycle and response times

Cycle time

Explains the definition, calculation, and influencing factors of CPU cycle time.

Response time

Defines response time and analyzes factors affecting its variation and calculation.

Interrupt response time

Technical data

CPU 315T-2 DP

Lists detailed technical specifications for the CPU, including versions, technology objects, memory, and execution times.

Integrated Inputs/Outputs for Technology

Describes the arrangement and technical specifications of the CPU's integrated digital inputs and outputs.

Information for the Changeover to the Technology CPU

Changed behavior of certain SFCs