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4
4 Instructions 4.3.1 Contact Comparison
FLD#: Floating-point contact comparison
◆
Overview
The FLD# instruction compares two operands and uses the comparison result to determine whether to set
a contact to ON or OFF (a node directly connected to the left-hand bus).
FLD# S1 S2
Floating-
point contact
comparison
Applicable model:
H3U
S1 Data 1 Element number of source data 1 32-bit instruction (9
steps)
FLDD#:
Continuous
execution
S2 Data 2 Element number of source data 2
Note: The # comparison operator can be =, >, <, <>, <=, or >=.
◆
Operands
Operand
Bit Element Word Element
System·User System·User Bit Designation Indexed Address Constant
Real
Number
S1 X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
S2 X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
Note: The elements in gray background are supported.
◆
Function
[S1] and [S2] are compared. The instruction is enabled when conditions are met; otherwise, it is disabled.
32-bit Instruction
Enabled State
Condition
Disabled State
Condition
FLDD> S1 > S2 S1 <= S2
FLDD>= S1 >= S2 S1 < S2
FLDD< S1 < S2 S1 >= S2
FLDD<= S1 <= S2 S1 > S2
FLDD= S1 = S2 S1 <> S2
FLDD<> S1 <> S2 S1 = S2
◆
Application
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