Chapter 16 PLC Function ApplicationsMS300 (High Speed Model)
16-93
API
FLD※
S1 S2
Floating point number contact form compare LD*
275~
280
Bit device Word device
16-bit command
－ － － －
32-bit command (9 STEP)
FLD※
Continuous
execution type
－ －
Flag signal: none
X Y M K H KnX KnY KnM T C D
S1
＊ ＊ ＊
S2
＊ ＊ ＊
Notes on operand usage: ＃：&、|、^
Please refer to the function specifications table for each device in
series for the scope of device usage
S
1
: data source device 1. S
2
: data source device 2.
This command compares the content of S
1
and S
2
. Taking "FLD=" as an example,
if the result of comparison is "equal," this command will be activated; but it will not
be activated when the result is "unequal."
The FLD* command can directly input floating point numerical values (for
instance: F1.2) to the S
1
, S
2
operands, or store floating-point numbers in register
D for use in operations.
This command can be used while directly connected with the busbar
API No. 32-bit commands
Conditions for
activation
Conditions for
inactivation
275
FLD＝
S
1
＝ S
2
S
1
≠ S
2
276
FLD＞
S
1
＞ S
2
S
1
≦ S
2
277
FLD＜
S
1
＜ S
2
S
1
≧ S
2
278
FLD＜＞
S
1
≠ S
2
S
1
＝ S
2
279
FLD＜＝
S
1
≦ S
2
S
1
＞ S
2
280
FLD＞＝
S
1
≧ S
2
S
1
＜ S
2
When the floating point number of register D200 (D201) is less than or equal
to F1.2, and X1 activated, contact Y21 will be activated and remain in that state.
FLD<=
D200 F1.2
X1
SET
Y21
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