Dl430 Special Requirements - Automation Direct DL405 User Manual

11–6
D4-02DA 2-Channel Analog Output
Module Operation
DL430 Special
Requirements
V40502
MSB
Y
5
7
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 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 can't access the data.
Correct!
Data is correctly entered so input points
start on a V-memory boundary address.
MSB
V40502
Y Y Y
5 5 4
7 0 7
Wrong!
Data is split over three locations, so instructions
cannot access data from a DL430.
MSB
LSB
Y Y Y
Y
5 4 4
3
0 7 0
7
D4–02DA
8pt 8pt 32pt
Output Output Output
Slot 0 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5
Y0 Y10
Y20
– – –
Y7 Y17
Y57
V40500
V40502 – V40501
LSB MSB
V40501
Y Y Y Y
4 3 3 2
0 7 0 7
D4–02DA
8pt 32pt 8pt
Output Output Output
Slot 0 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5
Y0 Y10
Y50
– –
–
Y7 Y47
Y57
V40501
MSB
LSB
Y
Y Y
Y
1
3 2
2
7
0 0
7
16pt 8pt 8pt
Output Input Input
Y60
–
Y77
V40503
LSB
Y
2
0
16pt 32pt 8pt
Output Input Input
Y60
–
Y77
V40500
LSB
Y Y
1 7
0
Y
0