Siemens S7-200 "Modbus RTU" Siemens Sinamics V20

SINAMICS V20 is a popular series of Siemens inverters with the advantages of versatility, compactness, simple installation, ease of use and cost savings. Flexible responsiveness to applications suitable for use in many fields.

Although the product line has a competitive price and saves investment costs for customers, Sinamics V20 is still integrated with many features of higher-end Sinamics inverter lines. Today plc247.com I will guide you to use Siemens S7-200 PLC to control it through Modbus-RTU protocol.

Siemens S7-200 & Sinamics V20 “Wiring Diagram”

Below is the RS485 communication connection diagram between the Siemens S7-200 PLC and the Sinamics V20 inverter.

Siemens Sinamics V20 Parameters Setting

In order for the Sinamics V20 inverter to be controlled and monitored by Modbus-RTU, we need to set the following communication parameters:

Siemens V20 Modbus Registers Address

Note: Siemens S7-200 Holding Registers Address =
“VFD Address (Dec) + 40001”

>>> Motor Control Address = 99 + 40001 = 40100 (dec)
+ Set Word 40100 = 1151 >>> Forward Run
+ Set Word 40100 = 3199 >>> Reverse Run
+ Set Word 40100 = 1150 >>> Stop

>>> Frequency Setting Address = 100 + 40001 = 40101 (dec)
+ Speed Reference = (0 to 16384) ~ (0 to 100% Max Frequency)

+ Output Frequency Address = 23 + 40001 = 40024 (dec)

+ Output Current Address = 24 + 40001 = 40025 (dec)

+ Output Speed Address = 25 + 40001 = 40026 (dec)

S7-200 Modbus Programming

+ Read/Write Distribution

+ Siemens S7-200 Port.0 Modbus Configuration

+ Setting Frequency

+ VFD Control Command

+ Read Data Monitoring

Project Video Tutorial

======

+ Download STEP7 MicroWIN V4.0 Siemens Software

+ Download Siemens Sinamics V20 Manual PDF

Password Extract: plc247.com

Please subscribe to Youtube channel and Website to read new articles of plc247.com, comment and share to the article if you find it interesting and useful.

Thanks and Best Regards!