Functions
8.14 Free function blocks
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-73
Example 2
Enabling the FFBs: P2800 = 1
Enabling individual FFB including assigning a priority:
P2801[3] = 2 OR 1
P2801[4] = 2 OR 2
P2802[3] = 3 Timer 4
P2801[0] = 1 AND 1
The FFBs are calculated in the following sequence: Timer 4 → OR 1 → OR 2 → AND 1
The function blocks are interconnected using BICO technology. In so doing, the function
blocks can be connected with one another as well as to other signals and quantities as long
as these signals or quantities have the appropriate attribute (BO, BI, CO and CI).
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