Mitsubishi Electric MELSEC FX3U Programming Manual page 423

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
1) Write the following data to [
instruction:
[ + 1,
S S
1 1
[ S + 5, S
1 1
[ S + 9, S
1 1
[ + 13,
S S
1
[ S + 4n + 1,
1
For example, store the 32-bit rising point data to devices having an even device number, and store the
32-bit falling data to devices having an odd device number.
When the command input is set to ON, "n" points starting from
Each rising point/falling point can be changed respectively by overwriting the data in [
[ +(n×2)+3,
S D
1 1
D
D
+1
D
+2
D
+3
0
Cautions
1. Specifying a high speed counter (C235 to C255)
In DABSD instruction, a high seed counter can be specified as
In this case, however, the output pattern contains response delay caused by the scan cycle with regard to the
current value of a counter.
When high responsitivity is required in FX
offered by the HSZ instruction, or use the HSCT instruction.
2. When specifying digits of a bit device as
1) Device number
Specify a multiple of 16 (0, 16, 32, 64 ...).
2) Number of digits
- In ABSD instruction (16-bit operation): Only K4 is available.
- In DABSD instruction (32-bit operation): Only K8 is available.
3. Other cautions
• The value "n" determines the number of target outputs (1 ≤ n ≤ 64).
• Even if the command input is set to OFF, the ON/OFF status of outputs does not change.
,
D S D S
1 1 1 1
Rising point
Data value
(example)
40
]
100
+ 4]
160
+ 8]
240
+ 12]
1
⎯
S + 4n]
1
+(n×2)+2].
D S
1 1
40 140
100 200
60 160
180
3U
14 Handy Instruction – FNC 60 to FNC 69
14.3 FNC 62 – ABSD / Absolute Drum Sequencer
+1] to [ +4n+2,
S D D S
1 1 1 1
Falling point
[ + 3, + 2]
S S
1 1
[ S + 7, S + 6]
1 1
[ S + 11, S + 10]
1 1
[ + 15, + 14]
S S
1 1
[ S + 4n + 3, S + 4n + 2]
1 1
D D
1
240 280
360
.
D S
2 1
/FX PLCs, use the table high speed comparison function
3UC
S
D
1
1
+4n+3] in advance using a transfer
Target output
Data value
(example)
140
D
200
D
60
D
280
D
⎯
D
change as shown below.
D S +1,
1 1
11
12
+1
+2
+3
13
+ n − 1
14
D S ] to
1 1
15
16
17
18
19
20
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