7 APPLICATION INSTRUCTIONS
7.9 Real Number Instructions
705
7
■Applicable devices
• These instructions perform a comparison operation between the single-precision real number in the device specified by
(s1) and the single-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.
• 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 LDE_ 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 ORE_ 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
There is no operation error.
Note that two values may not be equal due to an error when the E= instruction is used.
(1) Two values may not be equal.
Operand Bit Word Double word Indirect
specification
Constant Others
X, Y, M, L,
SM, F, B, SB,
FX, FY
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
U\G, J\,
U3E\(H)G
Z LT, LST,
LC
LZ K, H E $
(s1)
(s2)
Instruction symbol (ladder, FBD/LD) Condition Result
E=, EQ (s1)=(s2) Continuity state (ENO is on.)
E<>, NE (s1)(s2)
E>, GT (s1)>(s2)
E<=, LE (s1)(s2)
E<, LT (s1)<(s2)
E>=, GE (s1)(s2)
E=, EQ (s1)(s2) Non-continuity state (ENO is off.)
E<>, NE (s1)=(s2)
E>, GT (s1)(s2)
E<=, LE (s1)>(s2)
E<, LT (s1)(s2)
E>=, GE (s1)<(s2)
E* D0 E4.56 D2
E/ D2 E4.56 D2
X0
E1.23EMOV D0
M0
D0E= D2
(1)
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