Yaskawa MP900 Series Motion Programming Manual - Manual (Page 166)

4.6 Basic Functions
4 -33
The input units and output results are different for integer and real number data.
D Integer Data
The result is different from that obtained for the mathematical square root, and is calcu-
lated using the following formula:
32768 * sign(A) * |A|∕32768

sign(A): Sign of A register
|A|:
Absolute value of A register
That is to say, the output is the result of the mathematically expressed square root multi-
plied by √32768. When the input is a negative number, an absolute square root is calcu-
lated, and the negative number is taken as the operation result. The operation error is a
maximum of ±2.
D Real Number Data
The SQT command uses the immediately preceding operation result (real number data)
as input and returns the square root in a real number register.
Example:
D Integer Data
Integer Input
MW00100 = SQT (MW00102);
(01448) (00064) (8) (181)
64 
× 32768

= 1448
Negative Number Input
(−01448)
MW00100 = SQT (MW00102);
(−00064) (8) (181)
−

64 
× 32768
 
= 1448
D Real Number Data
Integer Input
MF00100 = SQT (MF00102);
(8.0) (64.0)
Negative Number Input
MF00100 = SQT (MF00102);
(−8.0) (−64.0)
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