Siemens CPU 31 Series Technical Data Manual page 251

Product Information
CPU 31xC and 31x, Technical Data Manual, Edition 01/2006
CPU 31xC and 31x, Installation, Operating Instructions, Edition 01/2006
S7-300 Instruction List, Edition 01/2006
S7-300 Getting Started Collection, Edition 01/2006
PROFINET Getting Started Collection, Edition 01/2006
This product information contains important information about the documentation mentioned
above. It is to be regarded as a separate component. Its specifications and information have a
higher binding nature than those of other manuals, instruction lists and Getting Starteds.
New CPUs with larger working memory
The working memory of the following CPUs was extended. The CPUs can now execute
larger user programs.
Due to these improvements, the order number of the CPUs were changed.
With the CPUs with firmware V2.1.10, V2.3.4 and V2.4.0 the functionalities remain un-
changed compared to the previous CPUs.
The new CPUs are:
• contained in STEP7 V5.4 Service Pack 1
• configurable with the older STEP7 versions:
The CPUs with the new order number can be downloaded from the Internet as a
hardware update (0103 to 0105).
Requirement is STEP7 V5.2, Service Pack1.
• configurable with the corresponding previous CPUs
• compatible with the previous CPUs
Non–retentive data blocks
In opposition to the data in the S7-300, CPU 31xC and CPU 31x manual, Technical
data", chapter 4.1.2, the CPUs with frimware V2.0.12 are no longer supported by re-
tentive data blocks. Non–retentive data blocks and code blocks can be loaded to the
maximum limit of the working memory. Retentive data blocks can be loaded to the
maximum retentive limit of the working memory (see the following table).
Copyright 2006 by Siemens AG
A5E00830174-01