Inovance H3U Series - Page 147

146
4
4 Instructions4.4.5 Exponent Operations
◆
Function
The square root of a binary oating-point number is calculated.
If the constant K or H is used as the operand S, the value is converted to a oating-point number before
square root calculation.
The zero ag M8020 is set if the result of the calculation is 0.
The value in S must be positive. If it is negative, a calculation error will occur, and M8067 and M8068 are
set to ON to identify this error.
Example:
ǒDESQR D200 D10Ǔ
X16 S
The square root of the binary floating-point number in (D201, D200)
is calculated . The result is stored in (D11, D10).
The square root of a floating-point number converted from K6789 is
calculated. The result is stored in (D21, D20).
The constant K6789 is converted to a binary floating-point number
before operation.
ǒDESQR K6789 D20Ǔ
(D201,D200)
SQR: Binary number square root operation
◆
Overview
The SQR instruction calculates the square root of a binary number.
SQR S D
Binary number
square root
operation
Applicable model:
H3U
S
Data
source
Data whose square root is to be calculated, or address of
the word element that stores the data
16-bit instruction
(5 steps)
SQR: Continuous
execution
SQRP: Pulse
execution
32-bit instruction
(9 steps)
DSQR:
Continuous
execution
DSQRP: Pulse
execution
D
Operation
result
Address of the word element that stores the calculated
square root
◆
Operands
Operand
Bit Element Word Element
System·User System·User Bit Designation Indexed Address Constant
Real
Number
S X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
D X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
Note: The elements in gray background are supported.
◆
Function
The square root of the BIN value in S is calculated. The result is stored in D.
The value in S must be positive. If it is negative, an operation error will occur, and the error ag M8067 is
set to ON to identify this error and the instruction is not executed.
The operation result D must be an integer. The borrow ag M8021 is set to ON when the fractional part (if
any) of the operation result is discarded.
The zero ag M8020 is set to ON when the operation result is 0.