Compare Double Integer Compare

Inputs/Outputs Operands Data Types
Inputs ID, QD, MD, SD, SMD, VD, LD, HC, AC, Constant, *VD, *AC, *LD DINT
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 Double Integer 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.

Double word comparisons are signed (16#7FFFFFFF > 16#80000000).

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.