Rockwell Allen Bradley PowerFlex 525 inverter has the following power and voltage ranges: single phase 200V: “0.4-15kW”, three phases 400V: “0.4-22kW”. Overload capacity: 150% for 60s for heavy load, 120% for 60s for normal load.
Integrated internal discharger throughout the power range. Integrated communication: Modbus RTU (422/485).
Today plc247.com will guide you to use Siemens S7-200 PLC to control PowerFlex 525 inverter through Modbus-RTU communication protocol in the easiest way to understand.
Siemens S7-200 & PowerFlex 525 “Wiring Diagram”
In addition to the basic parameters of the inverter installed according to the motor (frequency, current, voltage…) we need to install the following Modbus communication parameters:
PowerFlex 525 Registers Address Table
Note: Siemens S7-200 Holding Registers Address =
“VFD Address (Dec) + 40001”
+ VFD Control Address = 8192 + 40001 = 48193 (dec)
- Set Word 48193 = 18 (dec) >>> Run Forward
- Set Word 48193 = 34 (dec) >>> Run Reverse
- Set Word 48193 = 1 (dec) >>> Stop
- Set Word 48193 = 8 (dec) >>> VFD Fault Reset
+ Frequency Setting Address = 8193 + 40001 = 48194 (dec)
+ Frequency Output Address = 8451 + 40001 = 48452 (dec)
+ Current Output Address = 8452 + 40001 = 48453 (dec)
+ DC-BUS Voltage Address = 8453 + 40001 = 48454 (dec)
+ Voltage Output Address = 8454 + 40001 = 48455 (dec)
PLC Programming
+ Communication Distribution
+ S7-200 Modbus Configuration
+ Setting Frequency
+ VFD Control Setting
+ Read Data Output
Project Video Tutorial
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Related Software and Documents
+ Download Siemens STEP7 MicroWIN V4.0 Software
+ Download PowerFlex 525 Inverter Manual PDF
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