S5 plc help to load from EPROM

[BASS. EHIZ 0]

Please i need help i have a very old siemens PLC S5-90U, . the plc battery low and the program erase i want to run from backup on EPROM how can i do this. 

[sigmadelta 5]

1) Power on the PLC

2) Switch the selector switch to STOP

3) Remove the battery

4) Power off the PLC for at least 30 seconds

5) Make sure the EPROM is inserted into the PLC

6) Power on the PLC

7) Insert a new battery

Edited 17 Oct 2019 by sigmadelta

[Rodney 21]

Switch the selector to run