Backing Up The Program; Backing Up The Program On A Memory Submodule - Siemens S5-100U User Manual

S5-100U
4.4

Backing Up the Program

A program can be backed up only if the back-up battery is connected. Backing up copies a program
from the program memory of the CPU to a memory submodule. Only valid blocks are backed up.
As soon as you have changed the integral, default DB1 data block, it is a valid block that can be
backed up. See section 7.5.2.
4.4.1

Backing Up the Program on a Memory Submodule

You can use various EEPROM memory submodules to back up a program. Appendix D contains a
list of the submodules you may use. Figure 4-4 illustrates how to back up a program on a memory
submodule.
Battery low LED (yellow)
lights.
No
Turn off the S5-100U.
Plug EEPROM sub-
module into the CPU.
Turn on the S5-100U.
Press <COPY> key
for at least 3 s.
Red LED flickers;
Release <COPY>
Program is
1)
loaded.
Red LED lights;
Program backed up
on EEPROM
submodule.
The CPU is in the
Normal Mode.
1)
Program load time: 40 s/1024 statements
Figure 4-4. Procedure for Backing Up the Program on a Memory Submodule
EWA 4NEB 812 6120-02
Insert / replace
battery.
Yes
Error
Red LED flashes.
Release <COPY>
Red LED
lights.
- No / wrong sub-
module plugged
in.
- No program is in
the S5-100U.
Start-up and Program Tests
key.
Red LED
flashes.
Perform error
diagnostics
(see section 5.1).
4-7