Delta Electronics DVP15MC11T, Operation Manual

Page: 108 / 601

Chapter 8 Logic Instructions
8_

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 EQ_In1, EQ_In2 and EQ_In3 are INT, UINT and DINT respectively and the
data type of Out1 is BOOL.
Out1 changes to TRUE when the values of EQ_In1, EQ_In2 and EQ_In3 are 50, 50 and 50
respectively and EQ_EN changes to TRUE as shown in Variable 1.
Out1 changes to FALSE when the values of EQ_In1, EQ_In2 and EQ_In3 are 10, 50 and 100
respectively and EQ_EN changes to TRUE as shown in Variable 2.

Variable 1
Variable name Data type Current value
EQ_EN BOOL TRUE
EQ _In1 INT 50
EQ _In2 UINT 50
EQ _In3 DINT 50
Out1 BOOL TRUE

Variable 2
Variable name Data type Current value
EQ_EN BOOL TRUE
EQ _In1 INT 10
EQ _In2 UINT 50
EQ _In3 DINT 100
Out1 BOOL FALSE

The Program

The data types of EQ_In1 and EQ_In2 are both TIME and the data type of Out1 is BOOL.
Out1 changes to TRUE when the values of EQ_In1 and EQ_In2 are T#50ms and T#50ms
respectively and EQ_EN changes to TRUE.

The variable table and program
Variable name Data type Current value
EQ_EN BOOL TRUE
EQ _In1 TIME T#50ms
EQ _In2 TIME T#50ms
Out1 BOOL TRUE
1
EQ
EN E NO
In1 Out
In3
I n2
EQ _EN
E Q_In 1
E Q_In 3
E Q_In 2
Ou t1
1
EQ
EN E NO
In1 Out
I n2
EQ _EN
E Q_In 1
E Q_In 2
Ou t1
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