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Micrologix 1100 “Modbus RTU” PowerFlex 525 Tutorial

Written by plc247.com

Hello everyone!

In the previous post, plc247.com showed you how to use MicroLogix 1100 PLC to control Mitsubishi FR-E700 Series inverters via RS485 “Modbus-RTU” standard.

Today I would like to continue to guide you to use MicroLogix 1100 PLC to control PowerFlex525 Inverter

Micrologix 1100 & PowerFlex 525 “Wiring Diagram”

PowerFlex525 Communication Configurator

In order for the inverter to be controlled via “Modbus-RTU” communication, we need to configure the following minimum parameters:

Register Control Address
Note: MicroLogix 1100 Address = “VFD Address (Dec) + 1

>>> Motor Control Address = 8192 (Dec) + 1 = 8193

+ Set Word 8193 = 8 : Reset VFD
= 18 : Forward Run
= 34 : Reverse Run
= 1 : Stop

>>> Motor Frequency Reference Address = 8193 (Dec) + 1 = 8194

Register Monitoring Address

We will read the 5 main parameters of the inverter with a single command starting with the following address:

>>> Freuqency Command Address = 8450 (Dec) + 1 = 8451

MicroLogix 1100 Modbus RTU Settings

+ Channel Settings

MicroLogix 1100 Programming

+ Automatic Read/Write Distribution

+ Control Run Command

+ Frequency Setting Command

+ Data Response Monitoring

Video Tutorial

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References
>>> Download MicroLogix 1100 Manual PDF
>>> Download PowerFlex 525 VFD Manual PDF

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