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55985 - This document and attached ladder program illustrates how to communicate between a PowerFlex 40 or 4 to a MicroLogix 1100 using Ethernet
Access Level: Everyone
Date Created: 10/17/2008 03:39 PM
Last Updated: 05/25/2011 11:51 AM
How can a MicroLogix communicate to a PowerFlex 4 class drive (PowerFlex 4, 4M, 40, 40P, 400) over Ethernet?
To communicate between the MicroLogix 1100 and a PowerFlex 4 or 40 over Ethernet MSG instructions would be used.
Initially MSG instructions are needed to set up the PowerFlex Ethernet module to be controlled by the Ethernet module and not the Keypad.
The message write (MG9:4) writes to the timeout (N42:3).
This message has to execute and go done before the message write's to (N41:X) will go done.
If the timeout message is not executed sucessfully, the control messages N41:X will error out.
The timeout is stored in RAM in the 22commE card. If the drive is power cycled the MG9:4 write must be executed again.
The PowerFlex drive uses N41:0 as the Logic Command Word (Write) and Logix Status (Read).
A MSG read instruction would be used to get the status and a write instruction would be used to write a command.
Another MSG instruction with a data address at N41:2 would be used to read or write the speed reference of the drive.
A CIP Generic MSG could be used to read or write to other PowerFlex drive data.
See the attached sample code for specifics.
(NOTE: Attachment may require RSLogix 500 Version 8.10)
User Manual(s):
http://literature.rockwellautomation.co ... _-en-p.pdf
22-COMM-E EtherNet/IP Adapter, 22COMM-UM004B-EN-P, January 2004
File RSS:
http://rockwellautomation.custhelp.com/ ... get/17626/