661
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
29 Data Table Operation – FNC250 to FNC269
29.2 FNC257 – BAND / Dead Band 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
Program examples
1. Program example 1
In the program example shown below, the BCD data set in X020 to X037 is controlled by the dead band from
“-1000” to “+1000”, and a controlled value is output to D1 when X000 turns ON.
Operation
• In the case of “D0 < -1000”, “D0 - (-1000)” is output to D1.
• In the case of “-1000
≤
D0
≤
+1000”, “0” is output to D1.
• In the case of “D0 > +1000”, “D0 - 1000” is output to D1.
2. Program example 2
In the program example shown below, the BCD data set in X020 to X057 is controlled by the dead band from
“-10000” to “+10000”, and a controlled value is output to D11 and D10 when X000 turns ON.
Operation
• In the case of “(D1, D0) < -10000”, “(D1, D0) - (-10000)” is
output to (D11, D10).
• In the case of “-10000
≤
(D1, D0)
≤
+10000”, “0” is output to
(D11, D10).
• In the case of “(D1, D0) > +10000”, “(D1, D0) - 10000” is output
to (D11, D10).
0
1000
-1000
Output
Input
Output
Input
X000
K4X020
D0
FNC 19
BIN
K-1000
K1000
D0
D1
FNC257
BAND
END
0
+10000
-10000
Input
Output
Output
Input
X000
K8X020
D0
FNC 19
DBIN
K-10000 K10000
D0
D10
FNC257
DBAND
END