Function block group (FB) - Control

FB - Variables

FB - Math

Data flow

FB - Data

Execution direction

FB - Logic

As shown above:

  • A control logic program consists of a main loop and several command lines. After all commands are executed, the execution restarts from the first command line.
  • Each command line consists of one or more function blocks that run from top to bottom. Data within command lines flow from right to left.