Rievtech PR-12 Series, User Manual And Programmers Manual

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6.4.4 Real number comparison
Input / output
Operand
Data type
Input ID, QD, MD, SD, SMD, VD, LD, AC, constant, *VD, *LD, *AC Real number
Output
（
FBD
）
I, Q, M, SM, T, C, V, S, L, Enable bit Boolean
Comparison real number instructions are used for
comparing two values
：
IN1 and IN2.
Comparison includes
：
IN1 = IN2
、
IN1 >= IN2
、
IN1 <= IN2
、
IN1 >
IN2
、
IN1 < IN2 or IN1 <> IN2.Real number comparison with
symbol.
In LAD, when the comparison result is true, the contact
will be open.
In FBD, when the comparison result is true, the output
will be open.
Attention:The following conditions are serious errors .
These errors will cause the PLC to immediately stop the
execution of the program:
1.Enter illegal indirect address.
2.Enter the illegal real number.
Example: