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SUB_TOD_TIME
SUB_TOD_TIME subtracts a TIME value from a value of the data type TIME_OF_DAY. The result
Description
is stored in the output variable of the data type TIME_OF_DAY.
To add an enable input and enable output to the instruction, select [With EN/ENO] from the
"Instructions" pane (LD, FBD or IL editor). To reuse an instruction select "Recently used" from the
context menu or press <Ctrl>+<Shift>+<v> in the programming window.
PLC types
Availability of SUB_TOD_TIME (see page 1331)
Data types
Data type
TIME_OF_DAY
TIME
TIME_OF_DAY
In this example the function has been programmed in ladder diagram (LD) and structured text (ST).
Example
POU header
All input and output variables used for programming this function have been declared in the POU
header.
LD
ST
When programming with structured text, enter the following:
TOD_result
Subtracts a TIME value from the time of day
I/O
Function
1st input
minuend
2nd
subtrahend
input
output
result
:= SUB_TOD_TIME(TOD_value, TIME_value);
Date and time instructions
303
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