657
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
29 Data Table Operation – FNC250 to FNC269
29.1 FNC256 – LIMIT / Limit Control
21
FN
C
160-FN
C
169
R
eal
Ti
m
e
C
loc
k
C
ont
ro
l
22
FN
C
170
-F
N
C
17
9
E
xt
e
rnal
D
evi
ce
23
FN
C
180
Su
b
st.
I
n
str
. I
n
fo
24
FN
C
181-FN
C
189
O
ther
s
25
FN
C
190-FN
C
19
9
B
loc
k D
a
ta
O
per
at
io
n
26
FN
C
200-FN
C
209
C
har
act
e
r St
ring
C
ont
ro
l
27
F
N
C2
10
-F
NC
21
9
Da
ta
O
per
at
ion 3
28
FN
C
220-FN
C
24
9
Da
ta
Co
m
p
a
ris
o
n
29
FN
C
250-FN
C
269
Da
ta
T
a
b
le
O
per
at
io
n
30
FN
C
27
0-F
N
C
274
Ex
-D
ev
ic
e
In
ve
rte
r C
o
mm
s
2. 32-bit operation (DLIMIT and DLIMITP)
Depending on how the input value (32-bit binary value) specified by [
+1,
] compares to the range
between [
+1,
] and [
+1,
], the output value [
+1,
] is controlled.
• When controlling the output value using only the upper limit value, set “-2,147,483,648” to the lower limit
value specified in [
+1,
].
• When controlling the output value using only the lower limit value, set “2,147,483,647” to the upper limit
value specified in [
+1,
].
Error
An operation error is caused when the instruction is executed in the setting status shown below; The error flag
M8067 turns ON, and the error code (K6706) is stored in D8067.
Relationship
16-bit operation
≤
32-bit operation
[
+1,
]
≤
[
+1,
]
S
3
S
3
S
1
S
1
S
2
S
2
D
D
FNC256
DLIMIT
+1,
+1,
+1,
+1,
+1,
+1,
(
)
(
)
S
1
S
2
S
3
D
Command
input
In the case of “Lower limit value > Input value” .................................... Lower limit value
→
Output value
In the case of “Upper limit value < Input value” .................................... Upper limit value
→
Output value
In the case of “Lower limit value
≤
Input value
≤
Upper limit value” .... Input value
→
Output value
S
1
S
1
S
3
S
3
S
2
S
2
S
3
S
3
+1,
S
1
S
1
+1,
S
3
S
3
S
2
S
2
+1,
S
1
S
1
+1,
S
2
S
2
+1,
S
3
S
3
D
D
+1,
D
D
+1,
D
D
+1,
D
D
+1,
S
2
S
2
+1,
S
3
S
3
+1,
S
1
S
1
Output
value
Input
value
Output
value
Input value
Specified
Specified
S
1
S
1
S
2
S
2
S
1
S
2
S
1
S
1
S
2
S
2
Содержание FX3U Series
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