Delta MH300 Series - Page 965

Chapter 16 PLC Function ApplicationsMH300
16-102
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.
LD=
K200 C10
DLD>
K678493 C20
M3
Y10
LD>
D200 K-30
SET Y11
M50
X1