2-91

2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Comparison Instructions
2
=DT, <>DT, <DT, <=DT, >DT, >=DT
=DT, <>DT, <DT, <=DT, >DT, >=DT
Applicable Program Areas
Operands
C: Control Word

Bits 00 to 05 of C specify whether or not the time data will be masked for the comparison. Bits 00 to 05

mask the seconds, minutes, hours, day, month, and year, respectively. If all 6 values are masked, the

instruction will not be executed, the execution condition will be OFF, and the Error Flag will be turned

ON.

i
Instruction Mnemonic Variations Function
code Function
Time Comparison Instructions
=DT
<>DT
<DT
<=DT
>DT
>=DT
---
341
342
343
344
345
346
Time comparison instructions compare two BCD
time values and create an ON execution condition
when the comparison condition is true.
Symbol
=DT, <>DT, <DT, <=DT, >DT, >=DT
LD AND OR
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
C Con trol word WORD 1
S1 First word of present time WORD 3
S2 First word of comparison time WORD 3
S
1
C
S
2
Symbol
C: Control word
S
1
: First word of present time
S
2
: First word of comparison time
S
1
C
S
2
Symbol
C: Control word
S
1
: First word of present time
S
2
: First word of comparison time
S
1
C
S
2
Symbol
C: Control word
S
1
: First word of present time
S
2
: First word of comparison time
01234567815
0000000000
C
Masks seconds data when ON.
Masks minutes data when ON.
Masks hours data when ON.
Masks day data when ON.
Masks month data when ON.
Masks year data when ON.