Delta VFD2A8MS21ANSAA

Chapter 16 PLC Function ApplicationsMS300
751
API
LD※
S1 S2
Contact form compare LD*
224–
230
D
bit device
Word device
16-bit command (5 STEP)
LD※
Continuous
execution type
－
－
32-bit command (9 STEP)
DLD※
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 API 224 (LD=) as an
example, this command activates when the result of comparison is "equal," and
does not activate when the result is "unequal."
 You can use the LD* directly to connect with the busbar
API No.
16-bit
Commands
32-bit
Commands
Conditions for
Activation
Conditions for
Inactivation
224
LD =
DLD =
S
1
= S
2
S
1
≠ S
2
225
LD >
DLD >
S
1
> S
2
S
1
≤ S
2
226
LD <
DLD <
S
1
< S
2
S
1
≥ S
2
228
LD < >
DLD < >
S
1
≠ S
2
S
1
= S
2
229
LD < =
DLD < =
S
1
≤ S
2
S
1
> S
2
230
LD > =
DLD > =
S
1
≥ S
2
S
1
< S
2
 When the content of C10 is equal to K200, then Y10 = ON.
 When the content of D200 is greater than K-30, and X1 = ON, then Y11 = ON
and remains in that state.
 When C20 < K678493 or MI = ON, then MI50 = ON.
LD=
K200 C10
DLD>
K678493 C20
M3
Y10
LD>
D200 K-30 SET Y11
M50
X1