Delta Electronics DVP15MC11T Operation Manual page 100


Precautions for Correct Use

The input variables are not allowed to omit. An error will occur during the compiling of the software if
any input variable is omitted. But the output variable is allowed to omit.

The data type of output variables must be BOOL. Otherwise, an error will occur during the compiling
of the software.

Programming Example

The data types of LT_In1, LT_In2 and LT_In3 are INT, UINT and DINT respectively and the
data type of Out1 is BOOL.
Out1 changes to TRUE when the values of LT_In1, LT_In2 and LT_In3 are -10, 50 and 100
respectively and LT_EN changes to TRUE as shown in Variable 1.
Out1 changes to FALSE when the values of LT_In1, LT_In2 and LT_In3 are 20, 10 and 100
respectively and LT_EN changes to TRUE as shown in Variable 2.

Variable 1
Variable name
LT_EN
LT_In1
LT_In2
LT_In3
Out1

Variable 2
Variable name
LT_EN
LT_In1
LT_In2
LT_In3
Out1

The Program

The data types of LT_In1 and LT_In2 are both TIME and the data type of Out1 is BOOL.
Out1 changes to TRUE when the values of LT_In1 and LT_In2 are T#1ms and T#50ms respectively
and LT_EN is TRUE.

The variable table and program
Variable name
LT_EN
LT_In1
LT_In2
Out1
Data type
BOOL
INT
UINT
DINT
BOOL
Data type
BOOL
INT
UINT
DINT
BOOL
1
LT
LT_EN E N ENO
LT_ In1 In 1 O ut Out1
LT_ In2 In 2
LT_ In3 In 3
Data type
BOOL
TIME
TIME
BOOL
1
LT
LT_ EN E N ENO
LT_ In1 In 1 O ut Out1
LT_ In2 In 2
Chapter 8 Logic Instructions
Current value
TRUE
-10
50
100
TRUE
Current value
TRUE
20
10
100
FALSE
Current value
TRUE
T#1ms
T#50ms
TRUE
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8_