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6-7
E=,E<>,E>,E<=,E<,E>=
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6.1 Comparison Operation Instructions
6.1.3 Floating decimal point data comparisons (Single precision) (E=,E<>,E>,E<=,E<,E>=)
Operation Error
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and
an error code is stored into SD0.
• The value of the specified device is 0.
*1
(For the Basic model QCPU, High Performance model QCPU, Process CPU, Redundant
CPU) (Error code: 4100)
*1: There are CPU modules that will not result in an operation error if 0 is specified. For details, refer to
Section 3.2.4.
• The value of the specified device is outside the following range. (For the Universal model
QCPU)
0, 2
-126
| value of specified device | < 2
128
(Error code: 4140)
• The value of the specified device is 0, unnormalized number, nonnumeric, and ± .
(For the Universal model QCPU only) (Error code: 4140)
Program Example
(1) The following program compares 32-bit floating decimal point real number data at D0 and
D1 to 32-bit floating decimal point real number data at D3 and D4.
[Ladder Mode] [List Mode]
(2) The following program compares the floating decimal point real number 1.23 to the 32-bit
floating decimal point real number data at D3 and D4.
[Ladder Mode] [List Mode]
(3) The following program compares 32-bit floating decimal point real number data at D0 and
D1 to 32-bit floating decimal point real number data at D3 and D4.
[Ladder Mode] [List Mode]
(4) The following program compares the 32-bit floating decimal point data at D0 and D1 to the
floating decimal point real number 1.23.
[Ladder Mode] [List Mode]
Step
Instruction
Device
Step
Instruction
Device
Step
Instruction
Device
Step
Instruction
Device