Hello friends!
Continuing the series of articles using the Mitsubishi Q03UDV PLC combined with the QJ71C24N Module to control different articles, today plc247.com will guide you to control the Fuji Frenic inverter, this is a fairly common type of inverter.
This article is applicable to the inverters Fuji Frenic Mini, Fuji Frenic Multi, Fuji Frenic Eco… all have the same control method.
QJ71C24N & Fuji Frenic “Connection Diagram”
Below is a diagram of RS485 communication connection between QJ71C24N and “Fuji Frenic” inverter in a simple way.
Fuji Frenic “Modbus RTU” Parameters Setting
In addition to the basic parameters of the inverter installed according to the motor (frequency, current, voltage …) we need to install the following communication parameters to make the Fuji Frenic money controllable obtained by Modbus RTU protocol:
- H30 = 3 (VFD Control via RS485 Port)
- Y01 = 1 (Slave Address)
- Y02 = 0
- Y03 = 2
- Y04 = 2 (9600bps)
- Y05 = 0 (Data: 8bit)
- Y06 = 1 (Parity Check: Even)
- Y07 = 1 (Stop Bit: 1)
- Y10 = 0 (Modbus-RTU Selection)
- Y99 = 0
Fuji Frenic VFD “Group Address Mapping”
Fuji Frenic VFD “Registers Address”
>>> Frequency Reference Address = S(07H) + 05 = 705 (hexa)
>>> Operation Command Address = S(07H) + 06 = 706 (hexa)
- Set Word 706 (hex) = 1 >>> Forward Run
= 2 >>> Reverse Run
= 0 >>> Stop Run
>>> Output Frequency Address = M(08H) + 09 = 809 (hexa)
>>> Output Current Address = M(08H) + 11 = 80B (hexa)
>>> Output Voltage Address = M(08H) + 12 = 80C (hexa)
Mitsubishi QJ71C24N Modbus Configuration
Here are the steps to install parameters for QJ71C24N, please pay attention to follow them step by step:
+ Step 1: Create Project
+ Step 2: In/Out Assigment
+ Step 3: QJ71C24N “Channel.2” Parameters Setting
+ Step 4: Sent parameters to QJ71C24N Module
+ Step 5: Disable “Echoback”
>>> Set G450 = 1 (Disable Echoback) / = 0 (Enable Echoback)
QJ71C24N & Fuji Frenic “Modbus RTU” Configuration
+ Go to “Serial Communication Module…” Tool
+ Add/Read/Write Protocols
Project Protocols Configuration
+ Protocol No.1: “Func 06 / Write Single Registers”
- Slave Address = D100
- Register Adress = D101
- Register Value = D110
- “Comm. Error” = D300
+ Protocol No.2: “Func 03 / Read Holding Registers”
- Slave Address = D200
- Starting Address = D201
- Quantity of Registers = D202
- Registers Value Response = D210 (From D210…D335 depending on the number of Registers (D202) to read)
- “Comm. Error” = D300
Note: Need to set “Receive Wait Time > 0” otherwise when communication error the Module will wait for infinity
QJ71C24N Modbus Tutorial
+ Disable “Echo back”
+ Read/Write Distribution
+ Frequency Setting Command
+ VFD Control Command
+ Data Output Monitoring
Project Video Tutorial
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References
+ Mitsubishi GX Works 2 Software Free Download
+ PLC Q-Series & Weintek HMI “Modbus Configuration”
+ Fuji Frenic Inverter Manual PDF Download
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