Backing Up The Operating System - Siemens SIMATIC IM 151/CPU Manual

Backing Up the Operating System on the MMC
To back up the operating system, proceed as follows:
Table 5-6
Step
1. Insert a new micro memory card
(2 MB) in the CPU
2. Hold the mode selector in the
MRES position.
3. Switch the power off then on, and
keep the mode selector in the
MRES position until...
4. Move the mode selector to STOP
5. Move the mode selector briefly to
MRES, then let it snap back to
STOP
6. Remove the micro memory card
ET 200S Interface Module IM 151/CPU
A5E00058783-01

Backing Up the Operating System

Action Required
Functions of the IM 151/CPU
What Happens in the
IM 151/CPU:
The CPU requests a memory
reset
–
... STOP, RUN and FRCE LEDs
start flashing
–
The IM 151/CPU starts to back up
the operating system on the MMC.
All the LEDs light up during
backup.
The STOP LED flashes after the
backup has been completed. In
this way, the IM 151/CPU requests
a memory reset.
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5-11