|Inputs||ID, QD, MD, SD, SMD, VD, LD, AC, Constant, *VD, *AC, *LD||REAL|
|Output (FBD)||I, Q, M, SM, T, C, V, S, L, Power Flow||BOOL|
|Memory Ranges||ENO||Errors||Instruction Support for S7-200 CPUs||SIMATIC/International Mnemonics|
|The Compare Real instruction is used to compare two values: IN1 to IN2. Comparisons include: IN1 = IN2, IN1 >= IN2, IN1 <= IN2, IN1 > IN2, IN1 < IN2, or IN1 <> IN2.
Real comparisons are signed.
In LAD, the contact is on when the comparison is true.
In FBD, the output is on when the comparison is true.
In STL, the instructions Load, AND, or OR a 1 with the top of stack when the comparison is true.