Mitsubishi Electric MELSEC FX3U Programming Manual page 709

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DZONE and DZONEP)
The bias value specified by [
[ +1, ], and output to the device specified by [
S S
3 3
The bias value is added as shown below:
Command
input
FNC258
DZONE
S
In the case of "Input value < 0" ..................................Input value
S
In the case of "Input value = 0" ...........................................................................................0 → Output value
S
In the case of "Input value > 0" ..................................Input value
Caution
• When the output value overflows, it is handled as follows:
- In the 16-bit operation
The operation result is a 16-bit binary value with sign. Accordingly, if the output value is outside the
range from -32768 to +32767, it is handled as follows:
Negative bias value
Input value
- In the 32-bit operation
The output value is a 32-bit binary value with sign. Accordingly, if the operation result is outside the
range from -2,147,483,648 to +2,147,483,647, it is handled as follows:
Negative bias value [
Input value [
+1,
S S
1 1
S
S
1
2
S
+1,
3 3
+1, S
3 3
S
3 +1, 3
Output
value
Input
value
S
1 = -100
Output value = -32768+(-100)
S
= -32768
3
S S
1 +1, 1 ] = -1000
S S
+1, ] = -2,147,483,648
3 3
29 Data Table Operation – FNC250 to FNC269
] or [ +1, ] is added to the input value specified by
S S
2 2
+1,
D D
S D
3
S S
S
+1, +1,
3 3 1
Negative bias value → Output value
+
S S
S
3 +1, 3 +1,
2
Positive bias value → Output value
+
[
Output value
Positive bias value
[ ]
+1,
S S
2 2
0
= 8000H+FF9CH
= 7F9CH
= 32668
Output value = -2,147,483,648+(-1000)
= 80000000H+FFFFFC18H
= 7FFFFC18H
= 2,147,482,648
29.3 FNC258 – ZONE / Zone Control
].
S D D
+1,
1
D D
+1,
S D D
+1,
2
+1, ]
D D
Input value
[
S +1, S
3
Negative bias value
[ S +1, S ]
1 1
21
22
23
24
25
]
3
26
27
28
29
30
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