3.2 Functions with EN
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FUNCTIONS
3.2 Functions with EN
The function has two types: ordinary functions and functions with EN that have EN/ENO pins.
Functions with EN allow control of function execution.
EN inputs the condition for executing a function.
ENO outputs execution status.
The following table shows the status of EN and ENO and the operation result according to the
status of EN.
Table 3.2-1 Status of EN and ENO and the operation result according
to the status of EN
Functions with EN are expressed as 'Function name_E'.
Examples of use of EN and ENO
EN ENO Operation result
TRUE (Operation execution)
TRUE (No operation error) Operation output value
FALSE (Operation error) Undefined value
FALSE (Operation stop) FALSE Undefined value
No. Control description
➀
When the EN input is directly connected from the left base line, the EN input is always TRUE and the function is
always executed.
If the ADD_E function is used in this manner, the operation result is the same as the ADD function without the
EN input.
➁
When Variable_1 is connected to the EN input, the function is executed when Variable_1 is TRUE.
➂
When the result of Boolean operation is connected to the EN input, the function is executed when the result is
TRUE.
➃
When the ENO outputs are connected to the EN inputs, three functions are executed when Variable_1 is TRUE.
➄
When the ENO outputs are not connected, the execution status of the function is not output.
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