Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 709

Processing details
• These instructions perform a comparison operation between the double-precision real number in the device specified by
(s1) and the double-precision real number in the device specified by (s2). (Devices are used as a normally open contact.)
• The following table lists the comparison operation results of each instruction.
Instruction symbol (ladder, FBD/LD)
ED=, EQ
ED<>, NE
ED>, GT
ED<=, LE
ED<, LT
ED>=, GE
ED=, EQ
ED<>, NE
ED>, GT
ED<=, LE
ED<, LT
ED>=, GE
• If the data in the device specified by (s1) or (s2) is out of the range of setting data, the operation result will be non-continuity
(ENO OFF).
• If the LDED_ instruction is used in the program written in FBD/LD, use a left rail or a variable/constant which is always on
for EN.
• If the ORED_ instruction is used in the program written in FBD/LD and EN is set to TRUE, ENO turns on. EN will not be
an execution condition.
• When an input value is set using the engineering tool, a rounding error may occur. Refer to the following for the precautions
on setting input values using the engineering tool.
Page 49 Precautions
Operation error
There is no operation error.
Condition
(s1)=(s2)
(s1)(s2)
(s1)>(s2)
(s1)(s2)
(s1)<(s2)
(s1)(s2)
(s1)(s2)
(s1)=(s2)
(s1)(s2)
(s1)>(s2)
(s1)(s2)
(s1)<(s2)
Result
Continuity state (ENO is on.)
Non-continuity state (ENO is off.)
7 APPLICATION INSTRUCTIONS
7.9 Real Number Instructions
7
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