Chapter 14 PLC Function |C200 Series
14-61
API
240~
246
D
OR※
S1 S2
OR Compare※
Bit Devices Word Devices
X Y M K H KnX KnY KnM T C D
S
1
＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊
S
2
＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊
Operands: ※: =, >, <, <>,≦,≧
Please refer to the specifications of each model for the
range of operands.
16-bit command (5 STEPS)
OR※
ZRSTP
32-bit command (9 STEPS)
DOR※
－ － －
Flag signal: none
Explanation
1. S
1
: Data source device 1 S
2
: Data source device 2
2. This instruction compares the content in S
1
and S
2
. Take API240 (OR=) for
example, if the result is “=”, the continuity of the instruction is enabled. If the
result is “≠”, the continuity of the instruction is disabled.
3. OR (※ :※ =, >, <, <>, ≤, ≥) is an comparison instruction used on parallel
contacts.
API No.
16 -bit
instruction
32 -bit
instruction
Continuity
condition
No-continuity
condition
232
AND＝ DAND＝ S
1
＝ S
2
S
1
≠ S
2
233
AND＞ DAND＞ S
1
＞ S
2
S
1
≦ S
2
234
AND＜ DAND＜ S
1
＜ S
2
S
1
≧ S
2
236
AND＜＞ DAND＜＞
S
1
≠ S
2
S
1
＝ S
2
237
AND＜＝ DAND＜＝
S
1
≦ S
2
S
1
＞ S
2
238
AND＞＝ DAND＞＝
S
1
≧ S
2
S
1
＜ S
2
Example
1. When X1 = On and the present value of C10 = K200, Y0 = On.
2. When X1 = Off and the content in D0 ≠ K-10, Y11= On will be retained.
3. M50 will be On when X2=On and the content of 32-bit register D0(D11) <678,493
or M3= On.
AND=
K200 C10
DAND>
K678493 D10
M3
Y10
AND<>
K-10 D0
SET Y11
M50
X2
X1
X0
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