Commissioning and Diagnostics
4-8
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Backing Up the User Program
When the ET 200S is commissioned, the user program is still not secure against a
power failure, because it is only in the RAM load memory. To store the user
program in a powerfail-proof location, you have the following options:
Copy RAM-to-ROM:
Insert an empty memory module before the program is downloaded, and
acknowledge the memory reset request this causes. RAM to ROM copying is
initiated via the programming device.
Download the user program:
The program is downloaded from the programming device to the memory
module inserted in the CPU by means of the “Load User Program” function.
Transfer by means of the memory module:
The user program is transferred to the memory module on the programming
device. The memory module is then inserted in the CPU and the memory reset
request acknowledged.
See Section 5.4, ”Memory Module”.
Tip: Program OB 82 and 86 During Commissioning
Always program OB 82 and 86 when carrying out commissioning as a DP slave
with
STEP 7
in the DP master and the DP slave. This allows you to detect and
evaluate operating modes or interruptions in user data transfer (see Tables 4-5 and
4-6).
Note
Without configuration, a default startup is possible if the power modules are
switched on and all the modules are inserted.
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