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Today thelivingchristmascompany.com will write a tutorial on how to control Hitachi NE-S1 Inverter via Modbus-RTU (RS485) with Allen-Bradley MicroLogix 1100 PLC.
Both PLC MicroLogix 1100 and Hitachi NÉ1 VFD have a built-in RS485 port, but for easy wiring we can use additional Module 1763-NC01 for PLC (if not, use directly is also OK).
MicroLogix 1100 & Hitachi NE-S1 “Wiring Diagram”
+ SW5 Select “RS485 Mode”
Hitachi NE-S1 VFD Parameters Setting
To be able to control Hitachi NES1 with Modbus-RTU, in addition to the basic parameters of the inverter, we need to set the following communication parameters:
Hitachi NE-S1 Modbus Registers Map
Note: MicroLogix 1400 Address = “VFD Address (Dec) + 1“
- VFD Run / Stop “Coil Address” = 0 + 1 = “1” (dec)
- VFD Direction Roatation “Coil Address” = 0 + 1 = “2” (dec)
- VFD Trip Reset “Coil Address” = 0 + 3 = “4” (dec)
- VFD Set Frequency “Word Address” = 1 + 1 = “2” (dec)
- VFD Output Frequency “Word Address” = 1 + 4097 = “4098” (dec)
VFD Output Current “Word Address” = 1 + 4098 = “4099” (dec)
VFD Output Voltage “Word Address” = 1 + 4112 = “4113” (dec)
MicroLogix 1100 “Modbus” Configuration
+ For MicroLogix 1100 PLC, Channel.0 is the configuration for RS485 port (MiniDIN-8Pin), we need to set the same communication parameters as Hitachi NES1 VFD
PLC Programming
+ Auto Distribution
+ Set Frequency Command
+ VFD Run / Stop Control
+ VFD Direction Control
+ VFD Reset Control
+ Data Monitoring
Project Video Tutorial
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References
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