Delta DVP-ES2 User Manual
Page 587
3 . I n s t r u c t i o n S e t
3 - 4 7 1
API Mnemonic Operands
Function
224~
230
D
LD※
Contact Type Comparison
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Bit Devices
Word devices
Program Steps
Type
OP
X Y
M S K H KnX KnY KnM KnS T C D E F
S
1
* *
*
*
*
*
*
*
*
*
*
S
2
* *
*
*
*
*
*
*
*
*
*
LD※: 5 steps
DLD※: 9 steps
PULSE 16-bit 32-bit
ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2
Operands:
S
1
: Source device 1 S
2
: Source device 2
Explanations:
1.
This instruction compares the content in S
1
and S
2
. Take API224 (LD=) for example, if the
result is “=”, the continuity of the instruction is enabled. If the result is “
≠”, the continuity of the
instruction is disabled.
2. LD※ (※: =, >, <, <>,
≤, ≥) instruction is used for direct connection with left hand bus bar.
API No.
16 -bit
instruction
32 -bit
instruction
Continuity
condition
Discontinuity
condition
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
3.
When the MSB (16-bit instruction: b15, 32-bit instruction: b31) of S
1
and S
2
is 1, the
comparison value will be viewed as a negative value in comparison.
4.
When 32-bit counters (C200 ~ C254) are used in this instruction, make sure to adopt 32-bit
instruction (DLD※). If 16-bit instruction (LD※) is adopted, a “program error” will occur and the
ERROR indicator on the MPU panel will flash.
Program Example:
1.
When the content in C10 = K200, Y20 = ON.
2.
When the content in D200 > K-30 and X1 = ON, Y21 = ON and latched.
LD=
K200
C10
Y20
LD<=
D200
K-30
X1
SET
Y21