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7 BASIC INSTRUCTIONS
7.1 Comparison Operation Instructions
Processing details
• These instructions perform a comparison operation between the 32-bit binary data in the device specified by (s1) and the
32-bit binary data in the device specified by (s2). (Devices are used as NO contacts)
• The following table lists the comparison operation results of each instruction.
Precautions
• When the most significant bit is "1" in the data stored in (s1) or (s2), it is regarded as a negative binary value for
comparison. (Excluding unsigned operation)
• For comparison of 32-bit counter (LC), specify an instruction (LDD=, etc.) that handles 32-bit data. If an instruction (LD=,
etc.) that handles 16-bit data is specified, a program error or operation error occurs. (Same applies for index device (LZ) as
well.)
Operation error
There is no operation error.
Instruction symbol
Condition
Result
D=(_U)
(s1) = (s2)
Conductive state
D<>(_U)
(s1)
(s2)
D>(_U)
(s1) > (s2)
D<=(_U)
(s1)
(s2)
D<(_U)
(s1) < (s2)
D>=(_U)
(s1)
(s2)
D=(_U)
(s1)
(s2)
Non-conductive state
D<>(_U)
(s1) = (s2)
D>(_U)
(s1)
(s2)
D<=(_U)
(s1) > (s2)
D<(_U)
(s1)
(s2)
D>=(_U)
(s1) < (s2)
Summary of Contents for MELSEC iQ-F FX5
Page 1: ...MELSEC iQ F FX5 Programming Manual Instructions Standard Functions Function Blocks ...
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Page 1050: ...1048 26 TIME DATA FUNCTIONS 26 4 Division MEMO ...
Page 1068: ...1066 29 COUNTER FUNCTION BLOCKS 29 4 Counter Function Block Operation error There is no error ...
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