Rockwell Automation RECOMM-PBUS PROFIBUS Communications Module - Manual (Page 62)

6-10 PROFIBUS Communications Module
6.7 Sample SLC Ladder Logic - Main
Program
Figure 6.4 – Sample SLC Ladder Logic - Main Program
This sample 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 sample 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
SP600 Tabletop demo with RECOMM-PBUS
SP600 Tabletop demo with RECOMM-PBUS