L9E_MULDP: Double Precision Multiplication
(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_MULDP DFB multiplies a double precision operand 1 by a double precision operand 2 and stores the result in an array.
Representation
Parameters
Input Pin
Name
Data Type
Address Range
Meaning
Top
ENABLE
BOOL
–
ON = operand 1 multiplied by operand 2 and product posted in designated words.
Node
Node Type
Name
Data Type
Address Range
Meaning
Top
IN
VALUE1
ARRAY[1...2] OF UINT
%MW
double precision operand 1
Value 1 stores the high-order halves and low-order halves of operand 1, for a combined double precision value in the range of 0 through 99,999,999.
Middle
IN/OUT
RESULT
ARRAY[1...6] OF UINT
%MW
operand 2 and product
  • word 1 and 2 store the high-order and low-order halves of operand 2, for a combined double precision value in the range 0 through 99,999,999.
  • word 3 and 4 and word 5 and 6 store the double precision product in the range 0 through 9,999,999,999,999,999.
Output Pin
Name
Data Type
Address Range
Meaning
Top
OUT
BOOL
–
ON = operation successful
Middle
ERR
BOOL
–
ON = operand out of range