CODESYS Guide 2: Connecting iR-ETN

Connect iR-ETN to CODESYS

Follow these steps to connect an iR-ETN product to CODESYS.

1. Add Device

   Right click on Device (Weintek Built-in CODESYS) and select Add Device

   

2. Add an Ethernet Adapter

   In the Add Device window, select Fieldbuses -> Ethernet Adapter -> Ethernet version 3.5.10 and click Add Device
   The iR-ETN is an Ethernet based device, so you’re selecting it via device type, not specific model number.

   

3. Select ‘Device’ from the newly added Ethernet Adapter

   Right click on the newly added Ethernet adapter and select Add Device:

   

4. Choose MODBUS TCP Master

   Select Fieldbuses -> Modbus -> Modbus TCP Master -> Modbus TCP Master and click Add Device
   As the iR-ETN uses the MODBUS TCP Protocol, the CODESYS project needs to identify it by the protocol.

   

5. Add a MODBUS TCP Slave device, nested under the Master device created in the previous step

   Select the new Modbus TCP Master device, then select Fieldbuses -> Modbus -> Modbus TCP Slave -> Modbus TCP Slave and click Add Device

   

6. Enter the IP Address

   Double click the newly added Ethernet adapter to open the Ethernet device configuration. In the General tab, enter the IP address and Subnet mask to match your iR-ETN’s configuration
   This is the Ethernet Adapter, the first device that was added (the iR-ETN itself).

   

7. Enable Auto Reconnect of MODBUS TCP Device

   Double click the Modbus TCP Master device and navigate to the ModbusTCPMasterParameters tab and set AutoReconnect to TRUE

   

8. Select the network interface corresponding to the iR-ETN IP.

   With CODESYS connected to the base device, i.e. Device (Weintek Built-in CODESYS), click […] in the Ethernet device General tab and select the Network interface corresponding to the Ethernet device’s IP address

   

9. Change ‘Unit ID’ of MODBUS TCP Slave Device

   Double click on the Modbus TCP Slave device and go to the ModbusTCPSlave Parameters tab. There, change the Unit-ID Parameter to match the Unit ID on the iR-ETN module

   

10. Add a tag to the MODBUS Device

    To add a tag to the Modbus device, go to the Modbus Slave Channel tab and click Add Channel to open the Modbus Channel window. Select the access type to match the data type of the tag.
    In this case, a bool-type tag is being added, so the Read Discrete Input type is used

    

11. Add the same tag to the CODESYS program

    Double click on PLC_PRG in the Devices pane and add a Boolean tag

    

12. Connect the tag references

    With the tag added, double click on the Modbus TCP Slave device once more, go to the ModbusTCPSlave I/O Mapping tab, expand the Variable tree entirely and click the […] button to connect it to the new read Boolean tag

    

13. Attach the tag

    In the Input Assistant window, select Application -> PLC_PRG -> read to attach the read Bool tag to the Modbus channel created prior.