PLC Siemens S7-1200 and Inventer PowerFlex525 are two devices that are used a lot in European and American machines. Its quality is not to say much, and today plc247.com will guide you to connect them together.
plc247.com uses the Modbus-RTU communication standard. We need to use an additional RS485 expansion module, which is S7-1200 CB1241 (or S7-1200 CM1241) to connect to PowerFlex525.
S7-1200 & PowerFlex525 “Wiring Diagram”
Power Flex525 VFD Modbus-RTU Settings
In order for the inverter to be controlled by Modbus RTU, we need to configure the following parameters
Motor Control Register Address
>>> Control Address = 40001 (dec) + 8192 (dec) = 48193
+ Set Word 48193 = 0000.0000.0001.0010 = 18 (dec) >>> Motor Forward Run
= 0000.0000.0010.0010 = 34 (dec) >>> Motor Reverse Run
= 0000.0000.0000.0001 = 1 (dec) >>> Motor Stop
>>> Frequency Setting Address = 40001 (dec) + 8193 (dec) = 48194
Monitoring Register Address
Siemens S7-1200 Modbus-RTU Settings
Configuration Module S7-1200 CB1241
Create PLC Data Types
Create Data Block
S7-1200 Modbus-RTU Programming
+ Read and Write Distribution
+ Communication Configuration
+ Frequency Setting Command
+ Motor Control Command
+ Data Monitoring Read
Detailed Installation Instruction Video
Required software and documentation:
Password Extract: plc247.com
If you need assistance with any problem in using PLC S7-1200 to control PowerFlex525 VFD, please comment below the article.
Thanks and Best Regards!