5.6
376 Memory Submodules
This section provides a summary
••
of the use of the 376 memory submodules in the 928B, 928 and
922 CPUs,
••
and of the technical specifications.
5.6.1
Technical Description
The 376 memory submodules serve as a storage medium for user
programs and user data. They contain UV-erasable CMOS EPROMs.
376 memory submodules are available in the following capacities:
••
16 Kbytes
••
32 Kbytes
••
64 Kbytes
Ordering information
The order numbers for the SIMATIC S5 memory submodules can be
found in the ordering information.
5.6.2
Notes on Operation
Programming the memory
submodules
You program the 376 memory submodules off-line on the
SIMATIC S5 programmers. The link to the PG is provided by the
EPROM programming interface integrated in the PG.
A description of EPROM programming can be found in the STEP 5
manual. Use an adhesive label to cover the EPROM window (erasing
window) after programming.
Caution
CMOS memory submodules are destroyed by programming with
the wrong programming number. A list of valid order nos.
(MLFBs) and programming numbers can be found in your
STEP 5 software in the EPROM package.
5
376 Memory Submodules
System Manual
C79000-B8576-C199-03
5 - 55
