EJ1N-HFU-ETN PROFINET To Modbus-RTU Gateway
EJ1N-HFUB-ETN PROFINET to Modbus-RTU Gateway
The EJ1-HFUB-ETN is a PROFINET To Modbus-RTU Gateway. The unit can be directly connected to the EJ1 (Celciux) product range but as there is a RS-485 connection available at the EJ1 End Unit any Modbus-RTU device can be connected.
In the GSDML file a couple of devices are already pre-defined but with the flexible modules any register in Modbus-RTU devices can be accessed.
This article (CJ2M base) explains how to set up the configuration of a CJ1W-PNT21 PROFINET IO Controller to connect to an EJ1N-HFU-ETN which in its turn has through RS485 a MX2 Inverter connected.
Program Versions; CX-ConfiguratorFDT Version 1.2, CX-Programmer Version 9.3, CX-Drive Version 2.6
List of Steps
1. Configure the CJ1W-PNT21 and the EJ1N-HFU-ETN
Start CX-ConfiguratorFDT. Create a Project, Drag and Drop the CJ1W-PNT21. Configure the PLC Setup.
Install the GSDML file for the EJ1N-HFU-ETN. Drag and Drop the EJ1N-HFU-ETN into the Network.
In the EJ1N-HFU-ETN Configuration, Modules tab, select Unit Parameters. Set the Dataset to Parameter in the Submodule details section. In the Data field the Modbus Communication Parameters can be set.
Next step is to Add a new Module to the Group by Add Module and Select MX2 Inverter Drive flex. The Node number of the New Module is the Slot number. In the example the Slot number 1 corresponds to Modbus address 1. If the Slot number would be changed to for instance 5 then the MX2 Inverter should be set to Modbus address 5.
Standard are some Registers implemented. They can be changed in order, removed or added with new Sub Module to select the required Register.
In the CJ1W-PNT, Configuration, IO Device Setup Modify the Device Name into the Real Device Name.
Set the name of the EJ1_HFU-ETN through the PROFINET Identification - Network Scan. In the IO Device Configuration screen the exact Device Name and the IP address that the PROFINET IO Controller will set must be entered.
Do not forget the Apply button after changing settings.
In the CJ1W-PNT, Configuration, IO Device Area the CIO Area is filled with the EJ1N-HFU-ETN Module Mapping of the MX2 Inverter Drive flex in the Output and Input Allocation.
2. Wiring (Modbus)
3. Set the Modbus Parameters for the MX2
Start CX-Drive, Select the MX2 Inverter and set the parameters for the motor and application. Set the required Parameters for Modbus communication;
A001 = 4 (Modbus)
Pn C076 sets how the Inverter/Motor reacts on communication loss.
If Modbus is to slow for Start/Stop then use the standard I/O (A002) for Start/Stop and use the Modbus for Frequency Reference and Inverter Information.
Create Symbols conform the Output and Input Allocation of the CJ1W-PNT21.
Toggle Watch Window shows the Values and Commands that can be given to the MX2.
EJ1N-HFU-ETN.cpr ► CX-ConfiguratorFDT parameter file for the CJ1W-PNT21