TO_TOD block
Short summary
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Name |
TO_TOD |
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→POU type |
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Category |
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Conform to →IEC-standard |
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Graphical interface |
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Available since |
version 1.65.0 (for logi.CAD 3) |
more possible than defined in IEC-standard (see " 
Functionality
The blocks serves for explicitly converting the value connected to input IN into a value of data type TOD (= TIME_OF_DAY).
If the connected value is within the range of values overlapping for the data type of the input and for the result value TOD, the blocks returns this value. The conversion of the connected value is based on seconds, relative to the lower limit TOD#00:00:00 of TOD ( see under "Example for usage within ST-editor" and "Range of values for conversions" for lower and upper limits per data type).
Explicit conversion according to IEC-standard
The IEC-standard defines an explicit conversion of the following data types to TOD:
LDATE_AND_TIME, DATE_AND_TIME, LTIME_OF_DAY
The data type LDATE_AND_TIME and LTIME_OF_DAY are currently not supported in logi.CAD 3.
Inputs, return value
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Identifier |
Description |
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Inputs: |
IN |
REAL, LREAL, USINT, UINT, UDINT, ULINT, SINT, INT, DINT, LINT, TIME, BOOL, BYTE, WORD, DWORD, LWORD, DATE_AND_TIME, DATE or TIME_OF_DAY |
value to be converted |
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Return value: |
– |
TOD |
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Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.
See:
"Blocks for safe logic" whether this block is supported for developing safety-relevant applications.
"Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic .
Internal error diagnostic for block
The block checks the data type of the value connected to input IN and the return value respectively, before the block is executed. The output ENO of the block is set to value FALSE (or an equivalent), in case of the data type DATE_AND_TIME with a date part outside of the the valid range of values (analogously to the TO_DATE block).
Example for usage within ST-editor
The calculated values are evaluated by using the Assert block .
FUNCTION_BLOCK ExampleToTOD VAR result : TOD; END_VAR result := TO_TOD(IN := SINT#12); Assert(result = TOD#00:00:12);END_FUNCTION_BLOCKWhen creating your application within the ST-editor, enter a call of a block by typing the text as requested by the syntax or use Content Assist.
Range of values for conversions
The range of values for the conversions is determined by the lower and upper of the data types. This lower and upper limit per data type is listed under "Supported data types (in ST)".
Keep the following in mind: Input values out of the quoted range of values are interpreted as seconds according to the table and return a return value < TOD#00:00:00 or ≥ TOD#24:00:00.
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Lower limit |
Upper limit |
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Literal for IN |
Return value |
Literal for IN |
Return value |
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BOOL |
0 |
TOD#00:00:00 |
1 |
TOD#00:00:01 |
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BYTE |
16#00 |
TOD#00:00:00 |
16#FF |
TOD#00:04:15 |
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DATE |
any value |
TOD#00:00:00 |
any value |
TOD#00:00:00 |
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DINT |
0 |
TOD#00:00:00 |
86_399 |
TOD#23:59:59 |
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DT |
DT#1970-01-01-00:00:00 |
TOD#00:00:00 |
DT#1970-01-01-23:59:59.999 |
TOD#23:59:59.999 |
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DWORD |
16#0000_0000 |
TOD#00:00:00 |
16#0001_517F |
TOD#23:59:59 |
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INT |
0 |
TOD#00:00:00 |
32_767 |
TOD#09:06:07 |
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LINT |
0 |
TOD#00:00:00 |
86_399 |
TOD#23:59:59 |
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LREAL |
LREAL#0.0 |
TOD#00:00:00 |
LREAL#86_399.999 |
TOD#23:59:59.999 |
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LWORD |
16#0000_0000_0000_0000 |
TOD#00:00:00 |
16#0000_0000_0001_517F |
TOD#23:59:59 |
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REAL |
REAL#0.0 |
TOD#00:00:00 |
REAL#86_399.999 |
TOD#23:59:59.999 |
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SINT |
0 |
TOD#00:00:00 |
127 |
TOD#00:02:07 |
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TIME |
T#0s |
TOD#00:00:00 |
T#23h59m59.999s |
TOD#23:59:59.999 |
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TOD |
TOD#00:00:00 |
TOD#00:00:00 |
TOD#23:59:59.999_000_000 |
TOD#23:59:59.999 |
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UDINT |
0 |
TOD#00:00:00 |
86_399 |
TOD#23:59:59 |
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UINT |
0 |
TOD#00:00:00 |
65_535 |
TOD#18:12:15 |
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ULINT |
0 |
TOD#00:00:00 |
86_399 |
TOD#23:59:59 |
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USINT |
0 |
TOD#00:00:00 |
255 |
TOD#00:04:15 |
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WORD |
16#00 |
TOD#00:00:00 |
16#FFFF |
TOD#18:12:15 |