Siemens S5-135U/155U appendix Memory Submodules, Programming

CPUs, Memory Cards, Memory Submodules, Interface Submodules

5.9376 Memory Submodules

This section provides a summary

Sof the use of the 376 memory submodules in the 928B (up to -3UB12), 928 (up to -3UA12) and 922 CPUs,

Sand of the technical specifications.

Note

You cannot use the memory submodule 376 for the CPU 928B from version 3UB21, nor for the CPU 928 from version 3UA21.

5.9.1Technical 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:
	S	16 Kbytes
	S	32 Kbytes
	S	64 Kbytes
Ordering	The order numbers for the SIMATIC S5 memory submodules can be found in
Information	the ordering information.

5.9.2Notes 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

Memory

Submodule

Erasing a Memory Submodule

Before inserting a 376 memory submodule in the module receptacle of the CPU,

Sset the CPU mode switch to STOP

Sand switch off the PLC (Power Off).

376 memory submodules can be erased with a UV eraser. Before erasing, remove the plastic cover and the adhesive label from the erasing window.

5-82	System Manual
	C79000-G8576-C199-06