Siemens SIMATIC S5-100U System Manual page 143

S5-100U
Mode Change
Load program
(manual)
1. Turn off the PLC
2. Plug in memory sub-
module
3. Press COPY key and
hold it down
4. Turn on the PLC
- Red LED flickers
- Red LED lights when
program is loaded
5. Release COPY key
Test
mode
Reset PLC
(without PG)
1. Remove the battery
2. Turn off the PLC
3. Remove the memory
submodule
4. Turn on the PLC
EWA 4NEB 812 6120-02b
Back up program
(without PG)
Battery required
1. Turn off the PLC
2. Plug in EEPROM
submodule
3. Turn on the PLC
4. Press COPY key for at
least 3 s
5. Release it as soon as
the red LED starts
flickering
- Program is stored in
EEPROM submodule
and compiled in the
CPU's RAM
- Red LED lights
Load program
(with PG)
With or without battery
1. Turn on the PLC
2. Switch PLC to STOP
3. Perform an overall
reset with the PG
4. Enter the program
5. Transfer the program
Figure 7-10. Mode Change for CPU 102
Introduction to STEP 5
Load program
(automatic)
1. Reset the PLC
2. Turn off the PLC
3. Plug in memory
submodule
4. Turn on the PLC
- Red LED flickers
when program
loaded
Normal
mode
If program scanning is
interrupted
(fault, mode selector
at STOP or Power
OFF in the case of
battery backup), the
mode that was active
prior to the interruption
will be the operating
mode when RUN is
resumed.
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