Floating point number 'is equal to' comparison
==F command compares the input 1 value which is transferred as D.word with input 2 value which is transferred as D.word. Allows energy flow when Input 1 value is equal to input 2 value.
In the ladder code we wrote in the above example, the ID 0 value is compared with the ID 4 value. Energy flow will be allowed if values are equal.
ID 0 value = 40.0
ID 4 value = 99.0
When ==F command applied on this, Q 0.0 output will be logic 0 because of values are not equal.
Figure 1 Sample ladder code for ==F