Delta AS Series Programming Manual page 856

API Instruction code
1515 FLN
Device X Y M
 
S

D
Data
type
S
D
Symbol
Explanation
1. This instruction calculates the natural logarithm of the operand S in a single-precision floating-point operation.
2. The value in S only can be a positive value.
D
3. e =S.→The value in D=lnS.
4. If the operation result stored in D is 0, SM600 is ON.
Example
When X0.0 is ON, the DFLT instruction converts the value in (D1, D0) into the floating-point number, and stores the
1.
conversion result in (D11, D10).
When X0.1 is ON, the FLN instruction calculates the natural logarithm of the floating-point number in (D11, D10),
2.
and stores the operation result in (D21, D20).
Operand
P S, D
S T C HC
  
  
Pulse instruction
S ： Source value
Device where the operation result is
D ：
stored
Ch ap te r 6 Ap pl ie d Instruc ti ons
Natural logarithm of a binary floating-point
D FR SM SR
  
 


16-bit instruction
AS -
Function
number
E K 16# "$" F

32-bit instruction
AS
6 - 5 7 7
6_