420
FX
3G
/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 the following data to
to
+2n+1 in advance by a transfer instruction:
For example, store the 16-bit rising point data to an even device number devices, and store the 16-bit
falling data to an odd device number devices.
2) Output pattern
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
to
+n
×
2.
2. 32-bit operation (DABSD)
In this example, outputs are controlled to ON or OFF by one rotation (0 to 360
°
using the rotation angle signal
of 1
°
/pulse).
The present value
of the counter is compared with the data table having "n" lines starting from
[
+1,
] (which occupies "n" lines
×
4 devices), and consecutive "n" outputs starting from
are
controlled to ON or OFF during one rotation.
Rising point
Falling point
Target output
Data value (example)
Data value (example)
40
+ 1
140
+ 2
100
+ 3
200
+ 1
+ 4
160
+ 5
60
+ 2
+ 6
240
+ 7
280
+ 3
…
⎯
…
⎯
…
+ 2n
+ 2n + 1
+ n
−
1
D
1
S
1
D
1
S
1
S
1
S
1
D
S
1
S
1
D
S
1
S
1
D
S
1
S
1
D
S
1
S
1
D
D
1
D
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
D
1
S
1
D
1
D
Command
input
FNC 62
DABSD
n
S
1
S
2
D
S
2
X001
RST
X001
K360
Rotation angle signal of 1°/pulse
S
2
S
2