Delta MH300 Series - Page 968

Chapter 16 PLC Function ApplicationsMH300
16-105
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:
※
,
：
, =, >, <, <>, ≤, ≥
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 contents of S
1
and S
2
. Taking “FLD=”
as an
example, if the result of comparison is “equal”,
this command activates; but it
does not activate when the result is “unequal”.
 The FLD* command can directly input floating point numbers (for instance: F1.2)
to the S
1
and S
2
operands, or store the floating
point numbers in register D for
use in operations.
 You can use this command directly to connect 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 in
register D200 (D201) is less than or equal to
F1.2, and X1 is activated, then contact Y21 activates and remains in that state.
FLD<=
D200 F1
.2
X1
SET
Y21