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Continuing the Series using Siemens S7-200 PLC to control various devices via Modbus-RTU communication protocol, today plc247.com continues to guide you to control Hitachi NE-S1 inverters.
I will guide you to make the Hitachi NE-S1 control program in the simplest and easiest way, you can improve the program more intelligently after you have mastered the basic program.
Siemens S7-200 & Hitachi NES1 “Wiring Diagram”
Below is a diagram of Modbus-RTU RS485 communication connection between PLC Siemens S7-200 and Hitachi NE-S1 inverter:
Hitachi NE-S1 Modbus Parameters Setting
Below are the communication parameters that need to be set for the Hitachi NES1 inverter so that it can be controlled by Modbus-RTU communication:
+ Hitachi SW5 “Modbus Selection”
Hitachi NE-S1 Registers Address Table
Note: Siemens S7-200 Holding Registers Address =
“VFD Address (Dec) + 40001”
Coil Address =“VFD Address (Dec) + 1”
>>> Frequency Setting Address = 1 + 40001 = 40002 (dec – Register)
>>> VFD Start/Stop Address = 0 + 1 = 1 (dec – Coil)
>>> VFD Direction Address = 0 + 1 = 2 (dec – Coil)
>>> VFD Error Reset Address = 0 + 3 = 4 (dec – Coil)
+ Output Frequency Address = 4097 + 40001 = 44098 (dec – Register)
+ Output Current Address = 4098 + 40001 = 44099 (dec – Register)
+ Output Voltage Address = 4112 + 40001 = 44113 (dec – Register)
PLC Programming
+ Read / Write Distribution
+ Modbus Configuration
+ Frequency Setting Write
+ VFD Start/Stop Control
+ VFD Direction Control
+ VFD Reset Command
+ Output Frequency Monitoring
+ Output Current Monitoring
+ Output Voltage Monitoring
Project Video Tutorial
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References
+ Siemens S7-200 Programming Software Download
+ Hitachi NE-S1 Inverter Manual PDF Download
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