Mitsubishi Electric MELSEC iQ-R Series - Page 710

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7 APPLICATION INSTRUCTIONS
7.9 Real Number Instructions
Precautions
The maximum number of digits of a real number which can be input using the engineering tool is 15, and therefore these
instructions cannot perform comparison with a real number consisting of 16 or more effective digits. When these instructions
are used to determine the match or mismatch with a real number consisting of 16 or more effective digits, the instructions
need to compare the size with the approximate values before and after the real number to be compared.
Ex.
To determine the match between E1.234567890123456+10 (16 effective digits) and a double-precision real number
Ex.
To determine the mismatch between E1.234567890123456+10 (16 effective digits) and a double-precision real number
(1) Whether data in D0 to D3 are within this range is checked. (The boundary values are not included.)
(1) Whether data in D0 to D3 are within this range is checked. (The boundary values are included.)
E1.234567890123456+10E1.23456789012345+10 E1.23456789012346+10
ED< D0 E1.23456789012346+10ED< E1.23456789012345+10
Y10
D0
(1)
E1.234567890123456+10E1.23456789012345+10 E1.23456789012346+10
ED<= D0 E1.23456789012345+10
ED>= D0 E1.23456789012346+10
Y20
(1)