Siemens TIA Portal program blocks

With most of the program finished, we will be branching out to other types of program blocks.

Simatic STEP 7 supports four program blocks, as shown below, you are familiar with one of them already, the Organization block (OB). The others are as follow:

• Organization Block (OB): The main programming block that incorporate networks and components that drive specific tasks. More discussions later.
• Function block (FB): Create function blocks. More discussions later.
• Function (FC): A subroutine that perform a specific task, this block is called by the organization block.
• Data block (DB): An archive where a different set of tags and data are stored; it is used withfunctions.