xLadder user manual-V2.0.0.6

Example:

6.7.3 SQRT

Input/output Operand

Data type

IN

VD, ID, QD, MD, SMD, SD, LD, AC,constant, *VD, *LD, *AC

Real number

OUT

VD, ID, QD, MD, SMD, SD, LD, AC, *VD, *LD, *AC

Real number

SQRT:Enter a 32 bits real number(IN).Take “IN” square

root and output 32 bits real number.

Formula:

IN OUT 

error conditions:

Overflow

SM1.1

Special memory bits:

Zero result

SM1.0

Overflow

SM1.1

Negative result

SM1.2

SM1.1 is used for indicating overflow errors and illegal values.

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