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Single drive example, D-2 slc ladder logic examples – Rockwell Automation 22-COMM-P PowerFlex Profibus Adapter User Manual

Page 90

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D-2

SLC Ladder Logic Examples

Figure D.1 Main Routine

Single Drive Example

This example program is for a PROFIBUS demonstration using a SLC 5/ 04 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 40 with 22-COMM-P
Station 2 PowerFlex 40 with 22-COMM-P

The expample program demonstrates using Logic Command / Reference, Logic Status / Feedback and Parameter
Access using the Parameter Protocol.

On power-up, zero out the transmit buffer to the Scanner.

0

S:1

15

First Pass

FLL

Fill File
Source

0

Dest

#N20:0

Length

12

FLL

1

MOV

Move
Source

S:3

2561<

Dest

M0:1.4011

?<

MOV

The Scanner is configured to 12 bytes (6 words) of inputs for each drive. Two drives require 24 bytes (12 words).

Read the drives data from the Profibus scanner.

File N10: contains the acutal read data that can be used elsewhere in the ladder program.

Station 1 Station 2

Description

M1:1.0

(N10:0)

M1:1.6

(N10:6)

Logic Status

M1:1.1

(N10:1)

M1:1.7

(N10:7) Speed Feedback

M1:1.2

(N10:2)

M1:1.8

(N10:8) Parameter Protocol Word 1 (PCA)

M1:1.3

(N10:3)

M1:1.9

(N10:9) Parameter Protocol Word 2 (IND)

M1:1.4 (N10:4)

M1:1.10 (N10:10)

Parameter Protocol Word 3 (PVA 1)

M1:1.5 (N10:5)

M1:1.11 (N10:11)

Parameter Protocol Word 4 (PVA 2)

2

COP

Copy File
Source

#M1:1.0

Dest

#N10:0

Length

12

COP

Execute LAD 3 - Station 1 Drive Logic

3

JSR

Jump To Subroutine
SBR File Number

U:3

JSR

Execute LAD 4 - Station 2 Drive Logic

4

JSR

Jump To Subroutine
SBR File Number

U:4

JSR

Automatically have the SST-PFB-SCL scanner's watchdog period track that of the
SCL processor (recommended per SST user manual)

Write the drives' data to the profibus scanner.

File N20: contains the actual write data generated elsewhere in the ladder program.

Station 1 Station

Description

M0:1.0

(N20:0)

M0:1.6

(N20:6)

Logic Command

M0:1.1

(N20:1)

M0:1.7

(N20:7)

Speed Reference

M0:1.2

(N20:2)

M0:1.8

(N20:8)

Parameter Protocol Word 1

(PCA)

M0:1.3

(N20:3)

M0:1.9

(N20:9)

Parameter Protocol Word 2 (IND)

M0:1.4 (N20:4)

M0:1.10 (N20:10) Parameter Protocol Word 3 (PVA1)

M0:1.5 (N20:5)

M0:1.11 (N20:11) Parameter Protocol Word 4 (PVA2)

5

COP

Copy File
Source

#N20:0

Dest

#M0:1.0

Length

12

COP

6

END