L9E_TAN: Floating Point Tangent of an Angle (in Radians)
(Original Document)
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Naming
Name in LL984 Editor
Function Block Name
name of legacy 984 instruction
name in other tools and editors like:
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Function Description
The L9E_TAN DFB performs the tangent function on a floating point value of an angle in radians and stores the result in an array.
Representation
Parameters
Input Pin
Name
Data Type
Address Range
Meaning
Top
ENABLE
BOOL
–
ON = calculates the tangent of the value
Node
Node Type
Name
Data Type
Address Range
Meaning
Top
IN
RAD
ARRAY[1...2] OF UINT
%MW
floating point value indicating the value of an angle in radians
RAD stores a floating point value indicating the value of an angle in radians.
The magnitude of this value must be < 65536.0; if not:
  • The tangent is not computed.
  • An invalid result is returned.
  • An event is flagged in the L9E_ERLOG DFB.
Middle
IN/OUT
RESULT
ARRAY[1...4] OF UINT
%MW
tangent of the value in RAD
The tangent of the value is posted in word 3 and 4.
Word 1 and 2 are not used but allocation is required.
Note: To preserve space, you can make the %MW reference numbers assigned to word 1 and 2 equal to RAD, since word 1 and 2 are not used.
Output Pin
Name
Data Type
Address Range
Meaning
Top
OUT
BOOL
–
ON = operation successful
(Event is flagged in the L9E_ERLOG DFB).