184
Outline Compares one 32-bit data with another.
Program example
■ Operands
■ Explanation of example
• Compares the content of data registers DT101 and DT100 with the content of data registers DT1 and DT0 when
trigger X0 turns ON.
The compared result is stored in special internal relays R900A, R900B, and R900C.
When (DT1 and DT0) > (DT101 and DT100), R900A turns ON and external output relay Y0 turns ON.
When (DT1 and DT0) = (DT101 and DT100), R900B turns ON and external output relay Y1 turns ON.
When (DT1 and DT0) < (DT101 and DT100), R900C turns ON and external output relay Y2 turns ON.
In this program example, the comparison will be performed only when X0 turns ON.
Note:
• When processing 32-bit data, the higher 16-bit areas (S1+1, S2+1) are automatically decided if the lower
16-bit areas (S1, S2) are specified.
e.g., S1+1 (higher) = DT1, S1 (lower) = DT0
S2+1 (higher) = DT101, S2 (lower) = DT100
F61
(DCMP)
32-bit data compare
Availability
Step
9 All series
6-3. Description of High-level Instructions
S1
S2
32-bit equivalent constant or lower 16-bit area of 32-bit data to be compared
32-bit equivalent constant or lower 16-bit area of 32-bit data to be compared
Ladder Diagram
Boolean Non-ladder
Address Instruction
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