Rockwell Automation 20-COMM-P Profibus Adapter - Manual (Page 59)

Using I/O Messaging 5-9
Logic Command/Status Words
These examples use the Logic Command word and Logic Status word
for PowerFlex 70 and PowerFlex 700 drives. Refer to
Appendix C ,
Logic Command/Status Words for more information. The definition of
the bits in these words may vary if you are using a different DPI Host
product. Refer to the documentation for your Host product.
Figure 5.4 Example SLC Ladder Logic - Main Program
SLC Ladder Logic Example - Main Program
This example program is for a PROFIBUS demonstration using a SLC 5/05 processor with an SST Profibus scanner
(SST-PFB-SLC) in the first slot of the rack. The program is written for (2) drives on the network:
Station 1 PowerFlex 70 Tabletop demo with 20-COMM-P
Station 2 PowerFlex 70 Tabletop demo with 20-COMM-P
The example program demonstrates using Logic Command / Reference, Logic Status / Feedback, Datalinks, and Parameter
Access using the Parameter Protocol.
On power-up, zero out the transmit buffer to the Scanner.
0000
S:1
15
First Pass
FLL
Fill File
Source
0
Dest #N20:0
Length 28
FLL
Automatically have the SST-PFB-SLC scanner's watchdog period track that of the SLC processor (recommended per SST user
manual)
0001
MOV
Move
Source
S:3
2562 <
Dest
M0:1.4011
?<
MOV
SST Scanner
Write Data
Word 0
The Scanner is configured for 28 bytes (14 words) of inputs for each drive. Two drives require 48 bytes (28 words).
Read the drives data from the Profibus scanner.
0002
COP
Copy File
Source
#M1:1.0
Dest #N9:0
Length 28
COP
SST Scanner
Read Data
Word #0
20COMM-UM006A-EN-P.book Page 9 Friday, September 28, 2001 10:43 AM