Updating The Operating System - Siemens S7-300 Installation Manual

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After (compatible) function expansions or after an enhancement of operating
system performance the operating system should be upgraded to the latest version
(update).
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You can obtain the latest operating system versions from your Siemens partner or
from the Internet (Siemens home page; Automation and Drives, Customer
Support).
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If you back up your existing operating system to an empty MC before you start the
update, you can reload the "old" operating system in case you encounter any
problems.
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How to update the operating system (OS):
Table 10-2
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1.
2.
3.
4.
5.
6.
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
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Updating the operating system with MC/MMC
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Using STEP 7 and your
programming device, transfer the
update files to an empty MC.
Remove the back-
up/rechargeable battery from
relevant CPUs.
Switch off the CPU power supply
and insert the MC that contains
the OS update.
POWER ON.
Switch off the CPU power supply
and remove the MC that contains
the OS update.
Reinsert the back-
up/rechargeable battery into the
relevant CPUs.
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-
-
-
•
The CPU automatically recognizes the
MC and the OS update, and it starts the
update.
•
All LEDs are lit during OS update.
•
When the OS update is complete, the
STOP-LED flashes. The CPU is
requesting a memory reset.
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10-3