Module Operation; Dl430 Special Requirements - Automation Direct DL405 User Manual

Module Operation

DL430 Special Even though the module can be placed in any slot, it is important to examine the
Requirements configuration if you are using a DL430 CPU. As you can see in the section on writing
the program, you use V-memory locations to extract the analog data. As shown in
the following diagram, if you place the module so that the input points do not start on
a V-memory boundary, the instructions cannot access the data.
Correct!
Wrong!
Data is split over two locations, so instructions cannot access data from a DL430.
V40401
MSB
X X X
3 3 2
7 0 7
F4-04ADS 4-Channel Isolated Analog Input
F4–04ADS
8pt 8pt 16pt
Input Input Input
X0 X10 X20 X40
– – –
X7 X17 X37 X57
V40400
V40401
MSB
X X X
3 3 2
7 0 7
F4–04ADS
8pt 16pt 8pt
Input Input Input
X0 X10 X30 X40
– – –
X7 X27 X37 X57
LSB MSB
X X
2 1
0 7
16pt 16pt 16pt
Input Output Output
–
V40402
LSB
X
2
0
16pt 16pt 16pt
Input Output Output
–
V40400
LSB
X X X
1 7 0
0
4–9