Hello everyone, in the previous post plc247.com showed you how to use the Weintek MT8071iE HMI to connect to the Schneider ATV312 VFD via Modbus-RTU RS485.
Today I would like to continue to guide you to use the Keyence PLC in combination with the KV-L21V Module to control the ATV312 Schneider inverter to help you better understand Modbus-RTU.
Schneider ATV312 & Keyence KV-L21V Wiring Diagram
Schneider ATV312 Parameters Setting
In addition to the basic parameters set up according to the motor, we need to Setup the communication parameters as follows:
COM Menu >>> Add = 1 (Modbus Address)
>>> tbr = 9.6 (Baud rate)
>>> tF0 = 8E1 (8bit, Even, Stop bit 1)
>>> tt0 = 3.0 (Timer Detect Com. Error)
CtL Menu >>> LAC = L3
>>> Fr1 = Mbd
>>> Fr2 = Mbd
>>> CHCF = SEP
>>> Cd1 = Mbd
>>> Cd2 = Mbd
Register for Control
Here are the 2 main register addresses for the drive control to work
>>> Control Word = 8501 (dec) = 2135 (hex)
- Set 2135 (hex) = 6 >>> Enable Operation
- Set 2135 (hex) = 128 >>> Fault state reset
- Set 2135 (hex) = 15 >>> Forward Run
- Set 2135 (hex) = 2063 >>> Reverse Run
- Set 2135 (hex) = 4111 >>> Stop Run
>>> Frequency Set Address = 8502 (dec) = 2136 (hex)
Register for Monitoring
+ Output Frequency = 3202 (dec) = C82 (hex)
+ Output Current = 3204 (dec) = C84 (hex)
Keyence KV-L21V Communication Configurator
You configure according to the communication parameters as set in ATV312 VFD
PLC Keyence Modbus Programming
+ KV-L21V Delete Data when Start PLC ( Power ON)
+ ATV312 Start System & Reset Fault
+ Read and Write Distribution
+ Frequency Write Command
+ Motor Control Run
+ Read Data Output
Detailed Instruction Video
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Documents & Software:
+ KV Studio for KV5500 Programming Software
+ ATV312 Basic Setup PDF Download
Modbus Setup PDF Download
Register Address PDF Download
If you have any difficulty in connecting the Keyence PLC to the ATV312 Schnerder VFD, please comment below the article, I will reply as soon as possible.
Best Regards!
