Updating The Operating System; Backing Up The Operating System To Mc Or Mmc - Siemens SIMATIC S7-300 Hardware And Installation Manual

Operating system back-up on Memory Card or Micro Memory Card
How to back up the operating system:
Table 10-1
Step Action required
1. Insert a new Memory Card or Micro
Memory Card into the CPU.
2. Turn the mode selector switch to
MRES position and hold it there.
3. POWER OFF / POWER ON. Hold
the mode selector switch in MRES
position until ...
4. Mode selector switch to STOP
position.
5. Mode selector switch briefly to
MRES position, then let it return to
STOP.
6. Remove the Memory Card or Micro
Memory Card.

10.3 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 home page; Automation and Drives, Customer
Support).
Tip: back-up your operating system before you update it
back-up 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
A5E00105492-02

Backing up the operating system to MC or MMC

CPU Response
The CPU requests memory reset
-
... the STOP, RUN and FRCE LEDs start
flashing.
-
•
The CPU starts backing up the
operating system to MC/MMC.
•
All LEDs are lit during the back-up.
•
The STOP LED flashes when the
back-up is complete to indicate that
the CPU requires a memory reset.
-
Maintenance
10-3