Chapter 6 Applied Instructions
6-339
API Instruction code
Operand
Function
1511 D SQR P
S, D
Square root of the binary number
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
Pulse instruction
16-bit instruction (5 steps)
32-bit instruction (5 steps)
Symbol:
S
：
Source device Word/Double word
D
：
Device in which the result is stored Word/Double word
Explanation:
1. The square root of the value in the device specified by S is calculated, and the result is stored
in the device specified by D.
2. The operation result stored in D is an integer. If the floating-point number is rounded down to
the nearest whole digit, SM601 is ON.
3. If the operation result stored in D is 0, SM600 is ON.
Example:
When X0.0 is ON, the square root of the value in D0 is calculated, and the result is stored in D10.
Additional remark:
1. The value in the device specified by S only can be a positive value. If the value in the device
specified by S is a negative value, the operation error occurs, the instruction is not executed,
SM0 is ON, and the error code in SR0 is 16#2003.
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