L9E_CHSIN: Changing the Sign of a Floating Point Number
(Original Document)
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Naming
Name in LL984 Editor
Function Block Name
name of legacy 984 instruction
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Function Description
The L9E_CHSIN DFB changes the sign of a floating point value and stores the result in an array.
Representation
Parameters
Input Pin
Name
Data Type
Address Range
Meaning
Top
ENABLE
BOOL
–
ON = changes the sign of a floating point value
Node
Node Type
Name
Data Type
Address Range
Meaning
Top
IN
VALUE1
ARRAY[1...2] OF UINT
%MW
floating point value
VALUE1 stores a floating point value whose sign will be changed.
Middle
IN/OUT
RESULT
ARRAY[1...4] OF UINT
%MW
floating point value with changed sign
The arc tangent in radians of the floating point 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 VALUE1, 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.)