DAY_OF_WEEK : Day of the week

Description of the function

The function DAY_OF_WEEK provides the result of the day of the week, in the form of a whole number:

The additional parameters and can be configured.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

DAY_OF_WEEK

ST Out_Day_Of_Week

Representation in ST

Representation:

Out_Day_Of_Week := DAY_OF_WEEK();

Description of parameters

The following table describes the output parameters:

Parameter	Type	Comment
Out_Day_Of_Week	INT	Whole number from 1 to 7 indicating the day of the week: 1 for Monday, 2 for Tuesday, 3 for Wednesday, 4 for Thursday, 5 for Friday, 6 for Saturday, 7 for Sunday.

Runtime errors

If the function cannot update the result following a real-time clock access error, the result sent back is 0 and the system bit %S18 is set to 1.

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".