Chapter 7 Second Development Platform VP3000
348
API Instruction code Operand Function
127 D ESQR P S, D
Binary floating-point number square root
Type
Operand
Bit devices Word devices
16-bit instruction
- - - -
32-bit instruction (9 steps)
DESQR
Continuous
execution
type
DESQRP
Pulse
execution
type
Associated flag: none
X Y M K H KnX KnY KnM T C D
S
D
Caution for using operand
See the specification of each model for the scope of device’s usage.
Description
S: the source device for calculating square root
D: operation result
Calculate square root of the content in register that S designates, the result will be stored in
the register that D designates. The square root operation is performed in the form of binary
floating-point numbers.
If S is a designated constant K or H, the instruction will convert the constant into a binary
floating-point value before the square root operation.
Example
Example 1
When X0 = ON, calculate the square root of the binary floating-point number (D1, D0), and
store result to the register that (D11, D10) designate.
X0
DESQR D0 D10
Example 2
When X2 = ON, calculate the square root of K1234 (convert to binary floating-point number
automatically), and stores the result in (D11, D10).
X2
DESQR K1234 D10
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