Copy Ram To Rom - Siemens SIMATIC C7-621 Manual

Program development

Copy RAM to ROM

Since the PLC program is only saved in volatile load memory and not automatically in the C7 CPU flash
memory when it is loaded into the C7-CPU, the program would be lost if you restarted the C7-621. To
prevent this from happening, you must copy the PLC program explicitly into the flash memory. The
procedure is as follows:
Select the system function menu on the C7-621 by pressing the keys
Select the C7 CPU mode menu "KEY" by pressing
Select the STOP mode by pressing
If you have not yet entered a password, you are now prompted to do so. Password 100 is the default
setting when the C7 is delivered. Enter the digits 100 on the numeric keypad and press ENTER.
Now, select STOP mode again.
Select the Accessible Nodes
appears, select the folder MPI=2 . Copy the contents of the load memory into the C7 CPU flash
memory by activating the menu item PLC → Copy RAM to ROM . The PLC program is now secure.
Close the Accessible Nodes window .
Change back to RUNP mode on the C7-621 by pressing
You can now test the program for your filling plant on the practice PLC.
To check the function of the counter, call up the online database by selecting
in the SIMATIC Manager. Open Function FC16 and select the third network. Activate Test mode with
Debug → Monitor .
The status bit, the result of logic operation and the standard status are displayed for each program line. In
the last program line you will see the current counter state in hexadecimal notation.
Then close the LAD/STL/FBD Editor and your Getstart online project in the SIMATIC Manager.
Now open the Getstart folder.
22
F1
.
F3
. The STOP LED lights up.
symbol again in the SIMATIC Manager. In the dialog window that
0
S H IF T
.
F1
. The RUN LED lights up.
First Steps with the C7-621
A 03/99
from the tool bar
6ZB5610-0AF02-0BA0