380
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.3 FNC 62 – ABSD / Absolute Drum Sequencer
1) Write in advance the following data to [
,
+1] to [
+4n+2,
+4n+3] using a transfer
instruction:
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
change as shown below.
Each rising point/falling point can be changed respectively by overwriting the data in [
+1,
] to
[
+(n
×
2)+3, +(n
×
2)+2].
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 responsibility is required, use the table high speed comparison function offered by HSZ
instruction, or use 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.
Rising point
Falling point
Target output
Data value
(example)
Data value
(example)
[
+ 1,
]
40
[
+ 3,
+ 2]
140
[
+ 5,
+ 4]
100
[
+ 7,
+ 6]
200
+1
[
+ 9,
+ 8]
160
[
+ 11,
+ 10]
60
+2
[
+ 13,
+ 12]
240
[
+ 15,
+ 14]
280
+3
…
⎯
…
⎯
…
[
+ 4n + 1,
+ 4n]
[
+ 4n + 3,
+ 4n + 2]
+ n
−
1
D
1
S
1
D
1
S
1
D
1
S
1
D
1
S
1
S
1
S
1
S
1
S
1
D
S
1
S
1
S
1
S
1
D
S
1
S
1
S
1
S
1
D
S
1
S
1
S
1
S
1
D
S
1
S
1
S
1
S
1
D
D
1
D
D
1
S
1
D
1
S
1
D
1
S
1
D
1
S
1
40
140
100
200
160
240
280
180
360
60
0
z
+3
+2
+1
D
D
D
D
D
1
S
2
D
1
S
1
Содержание FX3U Series
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