Module Operation - 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 will 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.
Data is correctly entered so input points start
MSB
X
5
7
Wrong!
V40403
MSB
X X X
7 7 6
7 0 7
Correct!
on a V-memory boundary address.
V40402
X X
5 4
0 7
Data is split over three locations, so instructions
cannot access data from a DL430.
MSB
LSB
X
X
6
5
0
7
F4–08RTD 8-Channel RTD Input
F4–08RTD
16pt 8pt 16pt
Output Output Input
Slot 0 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5
Y0 Y20
X0
– – –
Y17 Y27
X17
V40400
V40401 – V40402
LSB MSB
V40401
X X X X
4 3 3 2
0 7 0 7
16pt 8pt 16pt
Output Output Input
Slot 0 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5
Y0 Y20
X0
– –
–
Y17 Y27
X17
V40402
MSB
LSB
X
X X
X
3
5 4
4
7
0 0
7
32pt 8pt 8pt
Input Input Input
X20 X60
X70
– – –
X57 X67
X77
V40403
LSB
X
2
0
F4–08RTD
8pt 32pt 8pt
Input Input Input
X20 X30
X70
– –
–
X27 X67
X77
V40401
LSB
X X
3 2
0 7
9–9
X
2
0