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16–6
F4–16DA–1 16-Ch. Analog Current Output
Module Operation
DL430 Special
Requirements
Data is split over three locations, so instructions cannot access data from a DL430
V40502
MSB
Y
Y
5
5
7
0
Even though the module can be placed in any slot, it is important to examine the
configuration if you're using a DL430 CPU. As you'll see in the section on writing the
program, you use V-memory locations to send the analog data. As shown in the
following diagram, if you place the module so the output points do not start on a
V-memory boundary, the instructions can't access the data.
Correct!
V40502
MSB
Y
5
7
Wrong!
LSB
MSB
Y
Y
Y
4
4
3
7
0
7
F4–16DA–1
8pt
8pt
Output
Output
Y0
Y10
–
–
Y7
Y17
V40500
LSB
MSB
Y
Y
Y
Y
5
4
4
3
0
7
0
7
F4–16DA–1
8pt
32pt
Output
Output
Y0
Y10
–
–
Y7
Y47
V40501
LSB
Y
Y
3
2
0
7
32pt
16pt
16pt
16pt
Output
Output
Input
Input
Y20
Y60
–
–
Y57
Y77
V40503
V40501
Y
Y
3
2
0
7
8pt
16pt
16pt
16pt
Output
Output
Input
Input
Y50
Y60
–
–
Y57
Y77
V40500
MSB
Y
Y
Y
Y
2
1
1
7
0
7
0
LSB
Y
2
0
LSB
Y
0
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