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Mitsubishi Electric FX3G SERIES Programming Manual page 670

Programmable controllers
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FX
/FX
/FX
Series Programmable Controllers
3G
3U
3UC
Programming Manual - Basic & Applied Instruction Edition
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.
X000
FNC257
BAND
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.
X000
FNC257
DBAND
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).
668
FNC 19
K4X020
BIN
K-1000
K1000
D0
FNC 19
K8X020
DBIN
K-10000 K10000
D0
29 Data Table Operation – FNC250 to FNC269
29.2 FNC257 – BAND / Dead Band Control
D0
D1
END
D0
D10
END
Output
Output
-1000
0
1000
Output
Output
-10000
0
+10000
Input
Input
Input
Input

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