Functions of the IM 151/CPU
5-8
ET 200S Interface Module IM 151/CPU
A5E00058783-01
5.4 Memory Module
Micro Memory Card
A micro memory card (MMC) is used as a memory module for the IM 151/CPU.
The MMC module can be used as a load memory and portable data carrier. The
following data is stored on the MMC:
User program (all blocks)
Configuration data (created with
STEP 7
)
Data for a firmware update (operating system)
Features
The micro memory card has the following features:
Compact, robust design
Integrated write protection (temporary and permanent)
Integrated error correction in the memory field
Hot swapping is possible
Fixed individual card identification
Polarity reversal protection
Micro Memory Cards that Can Be Used
The following memory modules are available:
Table 5-4 Available MMCs
Type Purpose Order Numbers
MMC 64 KB User memory 6ES7 953-8LF00-0AA0
MMC 2 MB Firmware update, user
memory
6ES7 953-8LL00-0AA0
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