Updating The Operating System - Siemens SIMATIC S7-300 Hardware And Installation Manual

Step
5. Mode selector switch briefly to
MRES position, then let it return to
STOP.
6. Remove the Memory Card or Micro
Memory Card.
9.3

Updating the Operating System

In which situations should I update the operating system?
After (compatible) function expansions or after an enhancement of operating
system performance the operating system should be upgraded to the latest version
(update).
Where do I get the latest version of the operating system?
You can obtain the latest operating system versions from your Siemens partner or
from the Internet (Siemens Homepage; Automation and Drives, Customer
Support).
Tip: Backup your operating system before you update it
Backup your existing operating system to an empty MC/MMC before you start the
update (see previous Chapter). This allows you to reload the "old" operating
system in case you meet any problems.
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
Action required CPU Response
•
The CPU starts backup of the
operating system to MC/MMC.
•
All LEDs are lit during backup.
•
The STOP LED flashes to indicate
successful backup. The CPU
requests memory reset.
-
Maintenance
9-3