Memory Submodules; Technical Description; Notes On Operation - Siemens S5-135U/155U System Manual

CPUs, Memory Cards, Memory Submodules, Interface Submodules
5.9

376 Memory Submodules

This section provides a summary
Note
You cannot use the memory submodule 376 for the CPU 928B from version
3UB21, nor for the CPU 928 from version 3UA21.
5.9.1

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:
Ordering The order numbers for the SIMATIC S5 memory submodules can be found in
Information the ordering information.
5.9.2

Notes on Operation

Programming
You program the 376 memory submodules off-line on the SIMATIC S5
the Memory
programmers. The link to the PG is provided by the EPROM programming
Submodules
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 numbers (MLFBs) and
programming numbers can be found in your STEP 5 software in the EPROM
package.
Inserting a
Before inserting a 376 memory submodule in the module receptacle of the
Memory
CPU,
Submodule
Erasing a Memory 376 memory submodules can be erased with a UV eraser. Before erasing,
Submodule
remove the plastic cover and the adhesive label from the erasing window.
5-82
of the use of the 376 memory submodules in the 928B (up to -3UB12),
928 (up to -3UA12) and 922 CPUs,
and of the technical specifications.
16 Kbytes
32 Kbytes
64 Kbytes
set the CPU mode switch to STOP
and switch off the PLC (Power Off).
System Manual
C79000-G8576-C199-06