Rockwell Automation 20-COMM-Q ControlNet Adapter - Manual (Page 99)

Using the I/O 5-25
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
Understanding PLC-5 Controller Data Table Addresses
Because the PLC-5 controller is a 16-bit platform and is used with the
32-bit 20-COMM-C or 20-COMM-Q adapter, the data will be transposed
from the least-significant word (LSW) to the most-significant word (MSW)
in the controller.
When the I/O was configured ( Chapter 4 ), two available data table
addresses (N9:0 for input data and N10:0 for output data) were used.
Figure 5.12 shows the data file address structure for this example.
Figure 5.12 Data File Table for Example Ladder Logic Program
Depending on the drive, Table 5.J , Table 5.K , Table 5.L , Table 5.M ,
Table 5.N , or Table 5.O show the I/O definitions as they relate to the N9:0
and N10:0 data table addresses in Figure 5.12 being used in this example.
TIP: When using a drive that has 16-bit Datalinks (PowerFlex 70,
PowerFlex 700, and PowerFlex 700H drives) to transfer a 32-bit parameter,
two contiguous drive Datalink parameters (for example, Data Out A1/A2,
B1/B2, and so forth) are required. To determine if a parameter is a 32-bit
parameter, see the Parameter section in the drive documentation and look
for a
symbol in the ‘No.’ column. (All parameters in PowerFlex 700
Series B drives are 32-bit parameters.) For example, parameter 3 - [Output
Current] in a PowerFlex 70 EC drive is a 32-bit parameter. When using a
drive that has 32-bit Datalinks (PowerFlex 700 VC, PowerFlex 700S, and
PowerFlex 750-Series drives), only one drive Datalink parameter is required
to transfer any parameter.
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