Correcting Ob1 - Siemens SINUMERIK 840D sl Configuration Manual

Programming the PLC

4.5 Correcting OB1

4.5 Correcting OB1
When inserting the blocks from a master copy of the library, the existing organization block OB1
is duplicated because it has a different name in the library than in the newly created PLC.
● Block in project tree: Main [OB1] or the name of your migrated block.
● Block in library: OB1 [OB1]
When the project is compiled, a message is displayed that there may only be one object of the
type "OB1".
Procedure
To identify the not required version of the OB1 and to rectify the problem, proceed as follows:
1. Delete one of the duplicated OB1 blocks in the "program blocks" folder:
– If the "program blocks" folder prior to the insertion contained only the empty Main [OB1]
– If you have already programmed your own instructions in the OB1, this block normally
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standard block, you can delete it.
already contains the call for the basic program and you can delete the newly added "OB1
[OB1]" block.
SINUMERIK STEP 7 Toolbox V15.1
Configuration Manual, 12/2018, A5E46279635B AA