Short summary

Name	`DIV`
→POU type	→function
Category	IEC-block, Numeric, block with internal error diagnostic
Conform to →IEC-standard	no restrictions
Graphical interface
Available since	version 1.0.0 (for logi.CAD 3)

Functionality

The mathematical function division is called: The block returns the quotient for IN1 / IN2.

Enter the value for the dividend at input IN1 and the value for the divisor at input IN2.

No check of invalid connections

For this block, invalid connections are not checked by logi.CAD 3 (except for the checks listed under "Internal error diagnostic for block"). Therefore, enter code in your application to detect invalid connections (e.g. IF-statements). See "Examples for invalid Connections".

See "IEC-blocks for the application" for information what the consequences of an invalid connection might be.

Inputs, return value

	Identifier	→Data type	Description
Inputs:	`IN1`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)	1st value (dividend)
Inputs:	`IN2`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)	2nd value (divisor)
Return value:	–	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)

Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.

Internal error diagnostic for block

The block checks for a division by 0 before it is executed.
In this error case, the output ENO of the block is set to value FALSE (or an equivalent).

Example for usage within ST-editor

PROGRAM Test
   VAR
      result : REAL;
   END_VAR
   result := DIV(IN1 := 10.0, IN2 := 2.0);    (* The variable 'result' evaluates to '5.0'. *)
END_PROGRAM

When 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.

Examples for invalid connections

An invalid connection due to →overflows or →underflows might occur during a calculation using DIV.

Example for invalid connections

DIV(IN1 := REAL#1.0e38, IN2 := REAL#3.0e-38);