
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
SITRANS SL
98
Operating Instructions, 12/2010, A5E01132948-04
4.
Pick your required CPU from the selection list and click the button "Next". Reaction: The
STEP 7 Wizard: "New Project" opens a dialog box for selecting the blocks.
5.
In the selection list mark the check boxes for OB1 (program cycle execution block),
OB100 (complete restart) and OB35.
Note
OB1 is the block which is continuously active in the background.
OB100 is the block which is called once during the startup of the PLC.
OB35 is the block that is called periodically with a timer interrupt. Its period can be
changed. SFC14 and SFC15 are the system functions that are used in OB35
organization block.
OB80 to OB88 are the organization blocks that are used for error situations.