693
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
28 Data Comparison – FNC220 to FNC249
28.2 FNC232~238 – AND=, >, <, < >, <=, >= / Data Comparison
21
FN
C
160-
FN
C
169
R
eal T
im
e C
lo
ck
C
ont
ro
l
22
FN
C
170-
FN
C
179
Exter
nal D
ev
ice
23
FN
C
180
Al
ter
nate
In
str
uc
tions
24
FN
C
181-
FN
C
189
O
ther
s
25
FN
C
190-
FN
C
199
B
lock D
ata
O
per
at
ion
26
FN
C
200
-F
N
C
20
9
C
har
acter
S
tring
C
ont
ro
l
27
FN
C
210-
FN
C
219
Da
ta
O
per
ation 3
28
FN
C
220-
FN
C
249
Da
ta
C
om
par
ison
29
FN
C
250
-F
N
C
26
9
D
ata T
abl
e
O
per
ati
on
30
FN
C
270-
FN
C
274
Ex
-D
ev
ice
Inv
ert
er
Com
m
s
Explanation of function and operation
FNC232 to FNC237 are data comparison instructions connected to other contacts in series.
The contents of
are compared with the contents of
in binary format, and a contact becomes
conductive (ON) or non-conductive (OFF) depending on the comparison result.
Cautions
1. Negative value
When the most significant bit is "1" in the data stored in
or
, it is regarded as a negative value in
comparison.
• In the 16-bit operation: bit 15
• In the 32-bit operation: bit 31
2. When using 32-bit counters (including 32-bit high speed counters)
Make sure to execute the 32-bit operation (such as "ANDD=", "ANDD>" and "ANDD<") when comparing 32-
bit counters (C200 to C255).
If a 32-bit counter is specified in the 16-bit operation (such as "AND=", "AND>" and "AND<"), a program error
or operation error will occur.
3. Programming of data comparison instructions
When programming in GX Developer, symbols "
≤
" and "
≥
" cannot be input.
Separate "
≤
" into "<" and "=", and separate "
≥
" into ">" and "=".
The input procedure is described below:
Operating procedure
a) Display the circuit program edit window, and put the cursor in a position where a data comparison
instruction is to be used.
b) Input "Instruction"
→
"space"
→
"value or device"
→
"space"
→
"value or device".
For an input example, refer to "Instruction input window in GX Developer" shown below.
c) Click the [OK] button.
d) Input other contacts and coil drive units consecutively.
Instruction input window in GX Developer
FNC No.
16-bit instruction
32-bit instruction
ON condition
OFF condition
232
AND=
ANDD=
=
≠
233
AND>
ANDD>
>
<=
234
AND<
ANDD<
<
>=
236
AND<>
ANDD<>
≠
=
237
AND<=
ANDD<=
<=
<
238
AND>=
ANDD>=
>=
>
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
<Input example for 16-bit operation>
<Input example for 32-bit operation>