Short summary

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

Functionality

The mathematical function multiplication is called: The block returns the product of all values connected to the inputs.

No check of invalid connections

For some blocks, invalid connections are not checked by logi.CAD 3. 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
	`IN2`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)	2nd value
	... (extensible until)
	`IN16`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)	16th value
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.

Example for usage within ST-editor

PROGRAM Test
   VAR
      result : REAL;
   END_VAR
   result := MUL(IN1 := 10.0, IN2 := 2.0);    (* The variable 'result' evaluates to '20.0'. *)
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 MUL.

Examples for invalid connections

MUL(IN1 := SINT#100, IN2 := SINT#5);
    (* Overflow: '100 * 5' would evaluate to '500' but calculates '-12'. Upper limit for SINT is '127'. *)
MUL(IN1 := SINT#-100, IN2 := SINT#5);
    (* Negative overflow: '-100 * 5' would evaluate to '-500' but calculates '12'. Lower limit for SINT is '-128'. *)
 
MUL(IN1 := REAL#1.0e38, IN2 := REAL#3.0e38); 