Arc Sine (Asn); Relay Ladder; Structured Text; Function Block - Allen-Bradley Logix5000 Reference Manual

Chapter 14 Trigonometric Instructions (SIN, COS, TAN, ASN, ASIN, ACS, ACOS, ATN, ATAN)

Arc Sine (ASN)

dest := ASIN(source);
Input Parameter Data Type
EnableIn BOOL
Source REAL
Output Parameter Data Type
EnableOut BOOL
Dest REAL
Description:
Arithmetic Status Flags:
538
The ASN instruction takes the arc sine of the Source value and stores the result in
the Destination (in radians).
Operands:

Relay Ladder

Operand
Source
Destination

Structured Text

Use ASIN as a function. This function computes the arc sine of source and stores
the result in dest.
See Structured Text Programming
within structured text.

Function Block

Operand
ASN tag

FBD_MATH_ADVANCED Structure

Description
Enable input. If cleared, the instruction does not execute and outputs are not updated.
Default is set.
Input to the math instruction.
Valid = any float
Description
The instruction produced a valid result.
Result of the math instruction. Arithmetic status flags are set for this output.
The Source must be greater than or equal to -1 and less than or equal to 1. The
resulting value in the Destination is always greater than or equal to -π/2 and less
than or equal to π/2 (where π = 3.141593).
Arithmetic status flags are affected.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Type Format
SINT Immediate
INT Tag
DINT
REAL
SINT Tag
INT
DINT
REAL
for information on the syntax of expressions
Type
FBD_MATH_ADVANCED
Description
Find the arc sine of this value
Tag to store the result
Format Description
Structure ASN structure