Siemens SINUMERIK 840D sl Configuration Manual

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]
standard block, you can delete it.
– If you have already programmed your own instructions in the OB1, this block normally
already contains the call for the basic program and you can delete the newly added "OB1
[OB1]" block.
Programming the PLC
4.5 Correcting OB1
SINUMERIK STEP 7 Toolbox V15.1
76 Configuration Manual, 12/2018, A5E46279635B AA

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based