
Maintenance
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
9-9
Note
Data in internal main memory will be lost if you replace the backup battery in
POWER OFF state of the CPU.
Always replace the backup battery in POWER ON state!
Replace the backup/rechargeable battery as follows:
Step
CPU 313/314
CPU 314 IFM/315/315-2 DP/
316-2 DP/318-2 DP
1.
Open the front panel of the CPU.
2.
Pull the backup battery/accumulator
out of the compartment with a
screwdriver.
Pull the backup/rechargeable battery
out of the compartment with its cable.
3.
Plug the connector of the new backup/rechargeable battery into the
corresponding socket in the battery compartment of the CPU. The notch on the
battery connector must show towards the left hand side.
4.
Insert the new backup/rechargeable battery into the battery compartment of the
CPU.
5.
Close the front door of the CPU.
Figure 9-5 Replacing the backup battery in CPU 313/314
How often do I have to replace it?
Backup battery: We recommend an annual replacement
Rechargeable battery: Never needs to be replaced.
Summary of Contents for Simatic S7-300
Page 10: ...Contents S7 300 Programmable Controller Hardware and Installation x A5E00105492 01 ...
Page 16: ...Preface S7 300 Programmable Controller Hardware and Installation 1 6 A5E00105492 01 ...
Page 22: ...Quick Guide S7 300 Programmable Controller Hardware and Installation 2 6 A5E00105492 01 ...
Page 28: ...Product overview S7 300 Programmable Controller Hardware and Installation 3 6 A5E00105492 01 ...
Page 74: ...Configuring S7 300 Programmable Controller Hardware and Installation 4 46 A5E00105492 01 ...
Page 102: ...Wiring S7 300 Programmable Controller Hardware and Installation 6 18 A5E00105492 01 ...
Page 148: ...Commissioning S7 300 Programmable Controller Hardware and Installation 8 36 A5E00105492 01 ...
Page 236: ...Glossary S7 300 Programmable Controller Hardware and Installation 12 16 A5E00105492 01 ...