Chapter 3 Deployment CPU 21x Manual VIPA CPU 21x
3-16 HB103E - Rev. 05/45
At this point the CPU attempts to reload the parameters and the program
from the memory card. → The lower LED (MC) blinks.
When the reload has been completed the LED is extinguished. The
operating mode of the CPU will be STOP or RUN, depending on the
position of the function selector.
Condition
The operating mode of the CPU must be STOP.
You may place the CPU in STOP mode by the menu command
PLC > Operating mode.
Overall reset
You may request the OVERALL_RESET by means of the menu command
PLC > Clear/Reset.
In the dialog window you may place your CPU in STOP mode if this has not
been done as yet and start the overall reset.
The S-LED blinks during the overall reset procedure.
When the S-LED is on permanently the overall reset procedure has been
completed.
At this point the CPU attempts to reload the parameters and the program
from the memory card. → The lower LED (without label) blinks.
When the reload has been completed, the LED is extinguished. The
operating mode of the CPU will be STOP or RUN, depending on the
position of the function selector.
The following approach deletes the internal RAM of the CPU completely
and sets it back to the delivery state.
Please regard that the MPI address is also set back to default 2!
• Push down the reset lever for app. 30 seconds. The ST-LED blinks.
After a few seconds the LED turns to static light. Count the number
of static light phases because now the LED switches between static
light and blinking.
• After the 6
th
static light you release the reset lever and push it down
again shortly. Now the green RUN-LED is on once. This means that
the RAM is totally deleted.
• Turn the power supply off and on again.
Automatic reload
Overall reset by
means of the
Siemens SIMATIC
Manager
Automatic reload
Set back to factory
setting
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