S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
9-1
Maintenance
9
9.1 Overview
S7-300 is a maintenance-free automation system.
Thus, maintenance is considered
• The backup of the operating system on a Micro Memory Card (MMC)
• The update of operating system from MMC
• Firmware update
• Backup of project data to a Micro Memory Card (MMC)
• Replacement of modules
• Replacement of fuses in digital output modules
• Replacement of digital output module AC 120/230 V.
9.2 Backup of firmware to Micro Memory Card (MMC)
In which situations should I back up the firmware?
In some cases, we recommend that you back up your CPU firmware:
For example, you might want to replace the CPU in your system with a CPU from store. In
this case, you should make sure that the shelf CPU has the same firmware that is used in
the plant.
We also recommend that you create a back-up copy of the firmware for emergency
situations.
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