Siemens SIMATIC S5-100U, System Manual

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