Siemens S5-135U/155U - Manual (Page 229)

5-89
System Manual
C79000-G8576-C199-06
Since the contents of the inserted RAM submodule are erased with each
overall reset, proceed as follows when using programmed RAM submodules
whose contents are not to be erased:
Initial situation:
S
The CPU is in the programmable controller.
S
The power supply of the PLC is switched off.
S
The mode switch of the CPU is at STOP.
Step Action
1 Insert another, unprogrammed memory submodule in the CPU.
2 Switch the power supply on.
3 Carry out an overall reset.
4 Switch the power supply off.
5 Remove the unprogrammed memory submodule.
6 Insert the programmed memory submodule.
7 Switch the power supply on.
8 Carry out a reset.
Before removing the RAM submodule, check whether the battery is still in
order: if the battery fault LED on the RAM submodule is lit whilst the PLC
supply voltage is switched on, the contents of the RAM submodule will be
lost when it is removed.
Initial situation:
S
The CPU is in the RUN state.
Step Action
1 Set the CPU mode switch to STOP.
2 Switch the power supply off.
3 Remove the memory submodule.
Inserting
Programmed
Memory
Submodules
Removing Memory
Submodules
CPUs, Memory Cards, Memory Submodules, Interface Submodules