S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
9-1
9Maintenance
9
9.1 In this Chapter
Maintenance = operating system backup/update, replacement of modules and
fuses
S7-300 is a maintenance-free PLC.
Therefore, maintenance is to be considered as:
• Backup of the operating system on Memory Card (MC) or Micro Memory Card
(MMC)
(depending on the CPU type)
• Operating system update from MC or MMC
• Replacement of modules
• Replacement of the backup/rechargeable battery (not with CPU 312 IFM and
CPU 31xC)
• Replacement of the fuses in digital output modules
In this chapter
we show you how to backup or update your operating system and to replace
modules, the backup/rechargeable battery and the 120/230 VAC fuse of the digital
output module.
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